JPH0252061A - Finger operating type pump - Google Patents

Abstract

PURPOSE: To enable fine spraying even if a nozzle actuator is slowly moved by using a spring playing the functions of both of a pressing means for pressing a poppet in order to close a discharge passage and part of a lost motion means. CONSTITUTION: A supply conduit 120 is communicated with a pump chamber 80 and a movable sealing conduit 190 is slidably engaged with the conduit 120 in a sealed state. The discharge passage 98 from the chamber 82 is formed at a piston. Further, the poppet 150 is provided with a valve means 162 for closing the flow passing a passage 98 and is provided with a valve means 180 for closing the flow passing the conduit 190. The lost motion means, with which the controlled movement between the poppet 150 and the conduit 190 is made possible between the first and second limited positions, is provided with the spring means 240 for engaging the poppet 150 and the conduit 190 when the poppet 150 and the conduit 190 exist in the first limited position by pressing the valve means 162 toward a piston 82.

Description

[Detailed description of the invention] Industrial applications The present invention is liquid I! J Atomizer, ie, pump.

The present invention is a small, portable, finger-actuated pump that is mounted on top of a liquid container and is capable of dispensing liquid in a desired form, such as a mist or foam, from a nozzle communicating with the top of the pump. It is particularly suitable for use as a pump.

Prior art and its problems Finger-operated pumps
ump ) h is generally used on the top of a compact container for liquid products, such as a metal can, glass bottle or plastic bottle, with a suitable nozzle structure formed as part of the lid. This nozzle structure allows the liquid to be delivered as a jet stream, spray, atomization, foam, or other suitable form.
be discharged. Such pumps can be used to dispense various liquid products such as detergents, hair conditioners, perfumes, deodorants, throat sprays, air fresheners, lotions, etc.

U.S. Patent No. 4.025 granted to Mixel Polis
．． No. 046 completely describes various prior art designs of finger actuated sparge pumps.

One design includes a pump chamber that projects upwardly and has a supply conduit therein, the upper end of which is open, and the lower end of which is connected to a liquid container at the bottom of the pump chamber. It is connected to a suction tube that extends all the way down inside.

A piston is slidably disposed within the pump chamber and includes a piston rod extending upwardly from the top of the pump chamber. A discharge passage is formed within the piston and piston rod and communicates between the pump chamber and the nozzle.

The poppet includes a valve member that seals against a valve seat on the piston. Also, this poppet is usually 4
The spring presses against the piston, occluding the flow through the entire discharge passage to the nozzle.
).

The poppet has an external pressure receiving surface that is always exposed inside the pump chamber. A generally cylindrical sleeve extends downwardly from the poppet and is adapted to be spaced apart above the national supply conduit when the pump is in the inactive position.

When the piston is moved downward into the pump chamber, such as by fully depressing the top of the nozzle, the poppet is pressed against the spring and the poppet sleeve telescopes along the open top edge of the suction conduit. and slide downwards to seal around the suction conduit. This increases the pressure of the liquid and residual gas inside the pump chamber as the piston moves further downwards. The component of this increased pressure acting upwardly on the piston is
It is countered by the downward pointing sword acting on the piston. Further, the above-mentioned large pressure component acting downwardly on the pressure receiving surface of the poppet generates a force acting on the spring through the poppet. When this pressure builds up sufficiently to overcome the spring force, the poppet is moved further downwardly within the pump chamber, causing the poppet valve member to move away from its position, opening a discharge passageway, and pressurized liquid to be sprayed through the nozzle. This is done rather than being released.

In another proposed design for a spray pump, the second
The piston is continuously engaged with the supply conduit, and a gravity-loaded check valve is interposed between the pump chamber and the supply conduit to ensure that the piston is not in contact with the supply conduit.
rsfilling). In most such designs, if the pump is reversed when the pump chamber is not under sufficient pressure, the check valve tends to move undesirably away from its seat. If this condition were to occur during pump operation, the pump would malfunction or become inoperable, even when the pump was in a generally upright position.

The above-described pumps are first operated to force a nozzle and associated piston down to expel liquid, and then the fingers are typically released or significantly reduced and a spring causes the poppet to move against the piston. and the poppet, together with the engaged bushing sleeve and nozzle, is forced upwardly into the fully raised position (i.e., the "rest" position in the initial non-actuated state). It is done so that it continues to be pushed towards. In this state, liquid is drawn from the container into the pump chamber.

The rate at which the pump chamber is refilled with liquid from the container, and the amount of liquid that can be held within the pump chamber, depends on the nature of the pump chamber and the pump characteristics provided to enable liquid refill. That's what I do. In such applications, it is desirable to have a relatively large pump chamber volume fi', and it is desirable to be able to refill it as quickly and thoroughly as possible.

Another problem to be solved is the initial injection into the pump. This is particularly a problem when the pump chamber has a relatively large volume. The air and/or liquid vapor initially present inside the pump chamber is compressed by the downward stroke of the piston. Since air is highly compressible, the pressure thus compressed usually causes the air to be ejected away from the piston through the nozzle, simultaneously reducing the total pressure inside the chamber. The pressure will not be high enough. Therefore, piste/
During the return stroke only little or very little liquid is drawn into the pump chamber, and only the trapped air becomes initially tense and occupies an increasing volume of the pump chamber. It is.

Various mechanisms have been provided for rounding the pump chamber to facilitate the injection of liquid from the container into the pump chamber by expelling air from the pump chamber. No. 849 describes the use of long bleed ridges on the lower inner wall of the pump chamber. This allows the compressed air to be discharged upwardly through the piston turn D at the lower limit of the piston stroke and to flow into the interior of the container through an opening formed in the upper part of the pump chamber. This generally works well in the particular pump configuration for which it is designed, but especially if the pump chamber has a large volume and the liquid refill volume, i.e., the injection flow rate, is high. It would be desirable to provide an improved structure to facilitate air evacuation and liquid injection.

The pump having the improved characteristics described above also advantageously reduces the number of components that are sealingly engaged when the pump is inactive. Continuous engagement of the seal components over extended periods of time can cause creep and permanent deformation of the flexible seal components.

Such deformation will reduce the effectiveness of the sealing function between the mating parts.

In many applications, very fine-grained l! It is desirable to perform Jg. The problems with different pump designs are:
Fine rlR misting will only occur if the user depresses the nozzle actuator with sufficient force and fast speed. On the contrary, especially at the beginning and end of liquid outflow, the liquid tends to trickle out of the nozzle as droplets without being atomized. Accordingly, an improved finger actuated pump is provided which allows liquid to be dispensed in a fine form regardless of how slowly or intermittently the user depresses the nozzle actuator. This is what is desired.

Furthermore, it can be assembled relatively quickly and easily;
It would be advantageous if the improved finger-actuated pump could be constructed with components having a small number of parts of up to /J'%, thereby making the pump easier to manufacture.

Finally, there is provided an improved pump as described above, in which the shapes of the components are simple, allowing for easy manufacture and assembly of the components. Because it is requested to do so.

Summary of the invention The present invention provides an improved finger actuated spray drinker.

The pump includes a pump chamber and a supply conduit communicating with the pump chamber. A movable seal conduit is provided to slidably and sealably engage the supply conduit in a telescoping relationship.

A first piston is operatively disposed within the pump chamber and defines an exhaust passageway from the pump chamber.

The poppet is provided with first valve means for closing the discharge passage. The poppet also includes second valve means for closing flow through the top of the movable seal conduit.

Idle movement means are provided to allow limited relative movement between the poppet and the seal conduit between the first and second limit positions.

In a preferred embodiment, the lost motion means (1) engages the poppet and seal conduit at least when the poppet and seal conduit are positioned in the first extreme position;
and (2) spring means for fully urging the first valve means of the poppet against the first piston.

The present invention alternatively provides (1) a biasing means, such as a spring, for urging the first valve means of the poppet against the first piston; (2) limited relative movement between the poppet and the sealing conduit. It can be specially rented as including a ninth empty movement means, which allows between the first and second limit positions. The lost movement means has nine pushing means portions positioned to engage the poppet and seal conduit in a first limit position of relative movement.

In a preferred embodiment, this biasing means, or spring means, is the second force in the relative movement of the poppet and seal conduit.
one spring operatively arranged to engage the poppet but not the sealing conduit when in the extreme position of the spring tt; In this second limit position, a portion of the poppet and a portion of the sealing conduit are engaged, which performs two functions: (1) sealing conduit?
(2) forming part of the idle motion means for limiting relative motion at a second limit position of relative motion;

According to the invention, the second valve means of the poppet during the compression stroke by the first piston when the sealing conduit and the poppet are located in the tenth limit position of relative movement. The seal can be designed to seal against the top of the conduit. When the first piston begins to rise towards its fully raised rest position on its return nine stroke, the second valve means and sealing conduit are spaced apart by the idle motion structure. Also, the seal conduit and the poppet are maintained at another limit position of relative movement for the remainder of the upward stroke, assisted by the frictional resistance between the seal conduit and the supply conduit. Air is allowed to vent down the suction tube into the interior of the container, and liquid is allowed to exit through the sealing conduit to refill the pump chamber.

This novel idle motion configuration allows advantageous use of the pump, if desired, in which the seal conduit is in the inactive "rest" position. The engagement with the groove WEk is completely released.

This prevents any permanent deformation or hardening of the sealing components of the supply conduit and sealing conduit that would be detrimental to the sealing function.

In a preferred embodiment, (1) a pressing means for pressing the poppet to close the discharge passage; (2) one of the idle movement means;
The use of a spring that performs both functions is advantageous in providing an overall movement structure that is easy to tear and assemble.

It has been found that the new and improved pump according to the invention is capable of operating at relatively large volumes and under relatively large amounts of reassurance. When used with appropriate nozzle construction, the improved fc indicator of the present invention can operate to provide a fine atomization with little or no droplet dripping.

When used in conjunction with other suitable nozzles, suitable liquid lotions, streams, foams, etc. can be ejected.

Furthermore, since the pump of the present invention is not equipped with a gravity-type check valve or a gravity-type backflow prevention valve, when pressure is continuously applied during the piston operation stroke, even if the pump is fully operated in an upside-down state, the pump will not operate properly. There is no undesired communication between the container and the liquid container.

Numerous other features and advantages of the invention will become apparent from the following description in conjunction with the accompanying drawings.

Preferred embodiments of the invention are described below with reference to the accompanying drawings:
Illustrated as an example only.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS While the invention may be embodied in many different forms of embodiment, this specification and the accompanying drawings fully illustrate only one particular form of embodiment in which the invention may be used. . death〃
It is not intended that the invention be limited to the embodiments so described, but the scope of the invention is set forth in the claims.

To simplify the explanation, the device of the invention will be described in its normal operating condition (upright). Therefore, terms such as up, down, horizontal, etc. are used based on this condition. However, it will be appreciated that the device of the present invention can be manufactured, shipped, and sold in orientations other than these five.

The preferred embodiment of the device is fully illustrated in the drawings, which show structural details and mechanical components that will be recognizable to those skilled in the art. However, a detailed description of these components is not essential to a full understanding of the present invention and is therefore omitted here.

Referring to FIG. 1, the pump of the present invention has a general reference numeral 20.
It is shown in Pump 20 is mounted inside a conventional lid cap 22. The lid cap 22 is attached to the top of the opening of a regular container 26 along with the pump 20 installed inside. It includes suitable means, such as threaded portions 24, for attachment.

The container 26 is filled with a liquid product (the portion below the pump 20 is omitted from the container 26 shown in FIG. 1).

The liquid is placed in a normal inhalation tube, i.e. Dixitube 30.
The entire liquid is sucked into the pump 20. This suction tube 30 is connected to the bottom of the pump 20 via any suitable conventional means. The suction tube 30 extends to near the bottom of the container 26. The bottom end of suction tube 30 is vertically immersed within the liquid when container 26 is in a generally upright position as shown in FIG.

The cap 22 has a hollow wall 31 that is generally cylindrical. This wall portion 31 entirely defines an inner cylindrical opening 32 which projects inwardly and is separated upwardly from the threaded portion 24 by a constant annular flange 34 . Cap opening 32
A collar 38 is attached inside. The collar 38 has an outer wall 40 at its lower end with seven outwardly projecting annular runs. ) 42 is formed. The collar flange 42 is held tightly against the top of the mouth of the container 26 by the cap flange 34.

The collar 38 is adapted to engage and retain the interior of the pump 20ffi cap 22. For this purpose, the pump 20 is moved outwardly at the upper end 5i! It has a 7 rank 50 output and contains an upper housing of 48 tl.

Flange 50 is engaged with a radially inwardly projecting ring 56 located on outer wall 40 of collar 38 . Collar 38μ can be simply snap-fitted onto pump housing 48 to effectuate this engagement.

Pump housing 48 defines an ipsilateral pump chamber 80 . In the preferred embodiment, pump chamber 80 is a generally cylindrical cavity having an open top within which inner cylindrical wall 72 of collar 38 is received. , wall 72 is connected to collar outer wall 40 via an annular top wall 64'. This inner wall 12
terminates inside pump chamber 48 at one tapered end 73 .

The seven rungs 50 at the upper end of the pump housing 48 have a vertical notch 62 (seen on the left side of FIG. 1) forming an air evacuation gap between the pump housing 48 and the outer collar wall 40. . This gap is made to cooperate with the air evacuation passage formed by the collar 38. In particular, the annular top wall 64 of the collar has a circumferential groove 68 on its underside.
is formed. This groove 68 communicates with the top of the cutter 2 (first @). This notch 62 or Ill:, 18
At the 0'' position, the groove 68 communicates with a radial groove 70 formed in the underside of the collar top wall 64 (second and eighth points). , the groove 10 extends inwardly over the entire wall of the pump housing 48.

The cylindrical shape of the collar has a plurality of circumferentially spaced outwardly projecting grooves 74 (FIGS. 2 and 8). The outside of the rib 74 @ the vertical surface is the pump housing 48
It engages the inner surface of the wall and serves to generally align the collar 38 and pump housing 481 in a concentric relationship.

An annular passage is provided around the inner top edge of the pump housing 48 as shown at 75 at the top of the rib 74 to form an annular passage around the crab 7-38. is forming. Rizzo 14
serves to form an air gap between the ribs so that the annular region below the rib T4 at the bottom of the cylindrical inner wall 72 of the collar can communicate with the annular passage around the top of the ridge 74. I have to. This creates an air ventilation passage tS from the interior of the pump housing 7 ring 48, which leads outward into the radial groove 7 (l), around the circumferential groove 681c, through the notch 62f, and through the collar ring 56. and the MJl between the cylindrical outer wall 40 of the collar and the pump housing 48
It opens downwardly into the interior head space above the liquid in the container 26. This air vent passage, along with other pump components, allows atmospheric air to vent into the container 26 as described below.

1 first piston 8 as best shown in FIG.
2 is sealably and slidably disposed within the pump chamber 80 for reciprocating movement. The first piston 82 includes an upwardly extending rod or stem portion 86. The stem portion 86 projects from the pump chamber 80 beyond the collar 38 and above the carriage 22. The rod or stem 86 has an upper cylindrical portion 88 adapted to receive the cutter and nozzle jet head or button 90. The illustrated ejection head 90 is of a normal spray type,
A spray orifice 92 is provided. These orifices are in communication with the top IK of the first piston stem 86 through appropriate passages 94'. Stem 8 protruding upward
The first piston 82 including 6 is hollow and forms an ejection passage 98 that ensures communication between the nozzle passage 94 and the pump chamber 80 .

The exterior of the first piston stem 86 is tapered such that the diameter of the stem 86 decreases with increasing height from the collar 38. An annular gap is always formed around the stem 86 and the top of the collar 38 so that air is directed downwardly along the stem 86 toward the bottom of the piston 82. 1st piston 8
2 is formed with an upwardly concave sealing surface 102, with the first piston 82 in the fully raised "rest" position shown in FIGS. 1 and 8. The inner wall bottom end 73 of the collar is sometimes adapted to receive and seal against each side.

However, as best shown in FIGS. 9 and 13, whenever the first piston 82 is partially or fully depressed, the piston's concave sealing surface 10
2 is moved out of sealing engagement with the inner wall bottom end 73 of the collar. An air gap is established between the reduced diameter upper outer surface of the stem 86 of the first piston that is moved downward and the inner wall bottom end T3 of the collar. This allows atmospheric air to flow into the interior of the container 26 to replace the volume of the discharged contents, and to maintain the interior of the container 26 at atmospheric pressure. With particular reference to FIG. 1, atmospheric air flows from outside the cap 22 over the top of the cap into the cap opening 32 and then into the underside of the hollow jet head, tongue gO1.

Referring to FIG. 13, when stem 86 is in the depressed position, air flows from the underside of actuator button 90 along a path indicated by flow direction arrow 106 between collar 38 and stem 86. and flows downward. x'tVc, indicated by flow direction arrow 108 in FIG. 16, this air then flows upwardly between the cylindrical inner wall 72 of the collar and the pump housing 4. This air then flows through the radial groove γ0 and into the circumferential groove 68 (see also FIG. 2), as indicated by the flow direction arrow 110 in FIG.

This air flows through the circumferential groove 68 in either direction over approximately 180° of the collar 38 and into the thirteenth
It flows through notch 62 in the pump housing as shown by flow direction arrow 114 in the figure.

This air flows further downwardly between the collar 38 and the pump housing 4B and into the top of the container 26, as indicated by flow direction arrow 116 in FIG.

Pump 20 is configured to allow liquid to flow from supply tube 30 through a fixed supply conduit into pump chamber 80 . The supply conduit includes a cylindrical tube 120 in the illustrated preferred embodiment. This tube projects upwardly inside the pump chamber 80 and terminates at an open upper end 121 .

Poppet 150 is a fixed supply conduit, i.e. tube 1
20 and is movable above the fixed supply conduit 120 together with and relative to the first piston 82 . In particular, this poppet 150 has a first valve means adapted to close off flow through the first piston discharge passage 98. For this reason, the first male stone 82 includes an enlarged diameter hole 154 (FIGS. 2 and 8). The upper end of this enlarged diameter hole 154 is opened to the small diameter discharge passage 98 at the position of the boat formed by the annular valve seat 158Vc.

The poppet 150 has an upwardly extending first valve member or means 162 (FIGS. 2 and 8) that seals against the annular valve seat 158 of the first piston 82, thereby providing a discharge passageway. Pump chamber 8 passing through 9B
0 to close off the upward flow of liquid.

Poppet 150 has flange 170 (Figures 5 and 8)
and a lower portion formed with a pin 230 projecting downward. As best shown in FIGS. 4 and 8, flange 170 has an upper piston surface 172. As best seen in FIGS. This surface 172 button is provided with four ribs 1γ4 that radially project outward on the surface 172. The upwardly facing surface 172 functions as a piston surface and is buttoned to receive pressure from a liquid button within the pump chamber 80 under conditions described in detail below.

Poppet flange 170 also includes a plurality of circumferentially spaced guides or fins (FIGS. 5, 6, and 8). As best shown in FIG.
The outer surface of 4 is slidably engaged with the wall surface of the bonding chamber 80 to guide movement of the poppet 150 in the axial direction.

? A pin 230 projecting downwardly at the bottom of the bed 150 includes four circumferentially spaced ribs 234 (FIGS. 5, 6, and 8). The ribs 234 form circumferentially spaced vertical structures 241 (FIG. 6 only). The bottom of the riser 234 is adapted to be engaged by the upper end of a biasing means, ie, a spring means, such as a helical coil compression spring 240 (FIG. 8).

Spring 240 is mounted within pump chamber 80. The bottom end of spring 240 is also received inside stationary supply conduit 120. The bottom end of spring 240 is maintained in #1 alignment by inner conduit 246. This inner conduit 246 projects upwardly from the inside of the supply conduit 120 and is optionally connected to the supply tube 30 and the supply conduit 120.
An entrance passage 248 is formed which communicates with the metal. The upper end of spring 240 is maintained in axial alignment by pin 230. This bottle 230 is a poppet 150
It extends downward from.

The lower side of the Boitt-Franzo 170 functions as the M2 valve means. Also, in particular the movable sealing means, namely the sealing conduit 1
Concave valve member face 180 sealing against the top of 90
is formed. The seal conduit 190 is engageable with the poppet 150 through a lost motion structure that allows for relative movement between the poppet 150 and the seal conduit 190, as described below. There is.

To this end, in the illustrated preferred form, the seal conduit 190 is generally cylindrical in shape and includes a generally cylindrical hollow lower wall 202 and an upper cross wall 222 .

The upper cross wall 222 of the seal conduit 190 is formed with an aperture 226 (FIGS. 6 and 8) through which a bog bottle 230 projects. As will be explained in more detail below, liquid can flow through this opening 226 to refill the bonding chamber 80 during certain stages of pump operation. The air or other steam flows in the opposite direction through the exhaust of the pump chamber 80 through the entire opening of 226, and this is a method described later in the "pump activation, pump chamber exhaust j J. The grooves 241 formed between the ports 2340, together with the openings 226, function as a flow path for fill liquid or exhaust air.

In FIG. 8, the top circumferential portion of spring 240 can be seen extending radially outwardly beyond poppet bottle 234 a sufficient distance to engage seal conduit 190. It will be done. In particular, in the inoperative position of the pump shown in FIGS. 1 and 8, the cross wall 222 of the conduit 190 is engaged with the top outer surface of the spring 240. Thus, the seal conduit 190 is gravitational-locked to the top outer surface of the spring 240 due to its own weight.

The engagement of spring 240 with poppet 150 and seal conduit 190 is the first of relative axial movement in the lost motion structure or means between poppet 150 and seal conduit 190.
It is characterized as the limit position or limit of the total formation. A second limit position or limit of relative axial movement in this lost motion configuration is the poppet where the sealing conduit 190 contacts the concave valve member face 180 of the second valve means of the poppet. 150 and the state position of the seal conduit 190 (factor 9). The upper cross wall 2221d of the seal guide g contacts the concave valve member surface 180 and the circumferential surface 218 at a second limit position of the range of relative movement.
(FIG. 9). 8th
1g from the first limit position in the range of movement shown in the figure.
The circumstances in which a relative movement to the second limit position in the range of movement shown in FIG. 9 occurs will be explained in detail below.

The hollow cylindrical wall 202 of the seal conduit 190 includes outwardly projecting circumferentially spaced guide ribs 25.
Contains 0. The guide ribs slidably contact the inner surface of pump chamber 80 to maintain axial alignment of seal conduit 190 within chamber 80 and with supply ring W120.

Placing the grooves 234 (FIGS. 6 and 8) and grooves 241 (FIG. 6 only) on the poppet bin 230 is opposed to placing the grooves on the cylindrical inner surface of the wrapper opening 226 of the poppet 190. , is considered to be a preferable structure. This is because it is desirable to mold the poppet 190 from a thermoplastic material to obtain a uniformly shaped poppet with little or no deformation as a result of the molding process.

The groove 241 is located at the opening 226 at the upper end of the seal guide W190.
If molded on the cylindrical inner surface of the seal conduit 1
The upper end of 90 is the sealing surface 218 of its sealing conduit 190.
It will have a thick region and a thin region radially inside. When the plastic material cools after being injection molded, the thicker portions will shrink more than the thinner portions. As a result, the sealing surface 21B is deformed so as to deviate from the required accurate circumferential surface,
This results in a compromised seal once the seal conduit 190 is engaged against the lower surface 180 of the poppet pal f150.

In contrast, if the ribs 234 and grooves 241 are molded into the poppet bin 230 as in the illustrated preferred embodiment, any small uneven shrinkage and resulting small deformation of the poppet bin 230 will It is not a particularly serious problem. because,
This is because there is circumferential clearance around the bottle 230, and the bottle 230 does not need to perform any sealing function.

The barb 240 functions as a pushing means to fully raise both the poppet 150 and the first piston 82 engaged therewith when the pump is in its inactive (i.e., unactuated) rest position. It is constantly pressed towards the desired position. Spring 240fi supports seal conduit 190 when pump 20 is inactive. The bottom of this seal conduit 190 is spaced above the open top end 121 of the fixed supply conduit 120.

The bottom end of seal conduit 190 is adapted to slide downwardly along fixed supply conduit 120 and in sealing engagement (see FIGS. 9-16). To this end, the bottom of the seal conduit 190 includes an inwardly projecting annular seal 261. This seal 260 is adapted to engage the outer surface of the supply conduit 120 as the movable seal conduit 190 is moved downwardly under circumstances detailed below.

The components of pump 20 described above are preferably manufactured from thermoplastic materials. However, spring 240 is preferably made of stainless steel. pump 2
This new design at 0.005 is $ 10.00 to manufacture the pump housing 48, including the fixed supply conduit 120, from polyzolopyrene.
This is suitable.

Other internal components (for example, the first piston 82,
The poppet 150 and seal guide 190 or other components may be made of polyethylene to provide a good seal.

This novel design of pump 20 allows its components to be easily assembled. Typically, the internal components of pump 20 are assembled and suction tube 30 is then attached to the bottom of pump housing 48 using conventional techniques.

Referring to the assembly of internal components, the movable seal guide v1
90 can be easily placed on the poppetkin 230 of the poppet 150. This assembled seal conduit 190 and poppet 150 is then easily seated within piston 82. These three components together with spring 240 of pump housing 48? It is inserted into the pump chamber 80.

Alternatively, the components are allowed to assemble themselves automatically. Bonpuno Uzing 48 is the jig,
That is, it is held in a nest. Thereafter, the spring 240 is dropped into the inside of the supply conduit 120 into the inside of the N-80 pump. Seal conduit 190 is then dropped onto spring 240. Poppet 1
50 is then dropped into the interior of pump housing 48 such that poppet bin 230 is projected downwardly into spring 240. First piston 82 is then dropped onto the top of poppet 150.

A collar 38 is seated on top of pump housing 48 about first piston stem 86 . and cap 22
is mounted around column 38.

Attachment of the actuator head or button 90 to the upper end of the first piston stem 86 completes assembly of the pump 20 with associated actuators and container closure members. Pump 20, cap 2
The complete assembly, including 2, button 90, and suction tube 30, is then attached to the top of container 26.

Operation of the Pump The operation of pump 20 will be described with reference to the steps in the operating sequence shown in FIGS. 8-13. This description of operation assumes that pump chamber 80 is initially substantially fully filled with liquid;
It is assumed that even residual air and/or liquid vapor can be accommodated to an extent of zero. The actual injection into the pump will be described below. For clarity, the liquid itself is not shown in the drawings.

The initial, non-active, raised position of pump 20 is shown in FIG. The first piston 82 is in its highest raised position and is engaged with the lower portion of the inner cylindrical wall 72 of the collar 38. The p-collar 38 thereby determines the maximum height of the first piston 82 within the pump chamber 80.

Poppet 150 is pressed upwardly by spring 240;
The discharge passage 98 of the first piston is closed. Seal conduit 190 is supported by the outer surface of the upper end of spring 240. The bottom end of the sealed conduit 190 connects to the fixed supply conduit 12
spaced above the top end 121 of 0 .

Pump 20 is already filled with liquid. This liquid fills the interior of fixed supply conduit 120 and a substantial portion of the remaining volume of pump chamber 80 below first piston 82 on both the interior and exterior sides of sealing conduit 190 .

77'20 actuator head, i.e. button 90
(FIG. 1), is actuated by applying a downward force to cause the first piston 82 to start moving downward within the pump chamber 80. Poppet 150 is also necessarily pushed downward by first piston 82 with which it is engaged.

The seal conduit 190 is held in place by the spring 240 until the inwardly projecting annular seal 260 at the bottom end of the seal conduit 190 engages the outer surface of the top end of the supply conduit 120 as shown in FIG. Continue to be supported. At this time, there is a sufficiently large frictional force between seal conduit 190 and supply conduit 120 to prevent further downward movement of seal conduit 190 by its own heavy chain. Until this engagement occurs, of course, the pump chamber 80 will not be compressed. If so, this pump chamber is connected to the supply conduit 120.
This is because it communicates with the inside of the container 26 throughout.

As shown in FIG. 9, the sealed conduit 1
90Fi remains stationary and engaged with fixed supply conduit 120. Meanwhile, first piston 82 and poppet 150 both continue to move downwardly relative to seal conduit 190. The extent of downward movement of poppet 150 permitted by the lost motion structure between pipette 150 and seal conduit 190 is such that the concave valve member face 180 of poppet 150 ultimately rests on top of seal conduit 190. This area is configured to be sealed against the contact peripheral surface 218.

until seal engagement at the top of seal conduit 190 occurs.
The first piston 82 moving downward is connected to the pump chamber 8
Any tendency to pressurize the air will force very little liquid and/or residual air (or vapor) to flow downwardly from the pump chamber 80 towards the fixed supply conduit 120 and back into the vessel 26. . Poppet 1
Upon sealing engagement between 50 and the top of seal conduit 190, communication between container 26 and pump chamber 80 is interrupted. As the bonding chamber 80fi first piston 82 moves downward, the pressure is increased.

Once poppet 150 is engaged against the top of seal conduit 190, continued downward movement of poppet 150 will necessarily cause seal conduit 190 to move downwardly along fixed supply conduit 120. It should be noted that this sealing engagement is maintained between the poppet second valve means face 180 and the sealing conduit contact circumferential surface 218.

FIG. 10 shows the relationship of the pump components at maximum pressure, just before liquid is first expelled upwardly through the pump. The first piston 82 inside the pump chamber 80 at the maximum pressure condition of the pump chamber.
The height position of the pump chamber 80 depends on the strength of the spring 240 and the initial chamber liquid filling condition (i.e., the liquid and/or residual air (or vapor) initially present in the pump chamber 80).
It is determined by 1).

At maximum pressure, the degree of compression of the liquid and any trapped residual air and/or vapor within pump chamber 80 is such that the downward force exerted on poppet piston surface 172 is caused by the force of spring 240. The upward pushing force is exceeded, and as a result, the poppet 150 is moved downward at a speed faster than the speed of the first piston 82. Thereby, the sealing surface 162 of the first valve means is connected to the discharge passage 98.
is opened, and this open state is maintained as long as this differential pressure is maintained (see FIG. 11).

While the discharge passage 98 is open, the liquid product flows through the passage 98.
11 as indicated by flow direction arrow 280 in FIG. This liquid is thus conveyed under pressure to the nozzle assembly where it enters the orifice 92.
It is released as a fine mist.

The downward movement of the first piston 82 is decelerated, or
For example, if the seal conduit 190 were to be completely stopped at the height [Y] as shown in FIG.
For example, it is stopped at a height position X shown in FIG. The spring 240 continues to urge the poppet 150 back upwardly against the first piston 82 as shown in FIG. 11A, so as to close the discharge passageway 98 after a sufficient amount of pressurized fluid has been discharged. Eggplant. That is, evacuation of liquid from the pump is terminated whenever the pressure drops below a predetermined operating pressure (set by a spring 240 actuated in conjunction with other pump components). It is. In this way, the liquid is always discharged at a predetermined pressure, so that by using suitable nozzles a suitable atomization is ensured. The tendency of the pump to drip droplets from the spray orifice 92 is substantially reduced or eliminated altogether.

? When the pet 150 is moved upwardly towards the first piston 82 to further close the discharge passage from the pump (first
1A), the seal conduit 190 is initially maintained stationary by frictional engagement with the supply conduit 120. Poppet 150 is therefore spaced apart from the top of seal conduit 190.

Finally, when the bolt 150 is moved upwardly enough to seal against the exhaust passageway 98, the top of the spring 240 around the poppet pin 230 engages the sealing conduit 190. (Figure 11A). First piston 82
is maintained at the first pressed position, i.e. the 11th
Assuming that the height position YK in FIGS. and FIG. The passageway 98 is then reclosed. This allows the upwardly moving poppet 150 to move the sealing conduit 1 within the range allowed by the cage in the idle motion structure.
Separated from 90. At this point, the pump chamber 80
The remaining pressure forces a small amount of liquid (and/or trapped air and vapor) into the lower region of poppet 150.

From this area, seal conduit 190 and fixed supply conduit 12
0 into the container 26.

The first piston 82 rises (e.g., FIG. 11A, r-6
(above the height position Y) 2. ′
The spring 240 simultaneously forces the seal conduit 190 and poppet 150 upwardly together in the spaced relationship shown in FIG. 11A. Poppet 150 continues to close exhaust passageway 98.

However, the first piston 82
With continued pressure further down inside the pump chamber 80, the poppet 150 again seals against the top of the seal conduit 190, and continued downward movement of the first piston 82 begins pressurizing the pump chamber 80. K becomes. Once the maximum design pressure is again achieved in the pump chamber 80,
The poppet 150 reverts from the first piston 82 to allow further evacuation of liquid from the pump.

Seal conduit 190 seals pump 20 due to frictional engagement with its own stationary supply conduit 120 during operation of the pump.
is held in place on the supply conduit 120 during pre-discharge pressurization of the pump chamber 80, even if the pump chamber 80 is inverted. Therefore, even if the container is inverted prior to spraying, pressure will remain in the container as long as the piston 82 is continuously pressed to seal the container 150 against the seal conduit 190. There is no chance that it will be released carelessly. During this time, the pump chamber is compressed, albeit at a very low pressure.

The downward stroke of the first piston 82 is mechanically terminated at the maximum stroke length shown in FIG.

At the lower limit position of this stroke, the first piston 82 with the poppet 150 seated and the seal conduit 190 in sealing engagement with the lower side of the pipette 150
sufficiently downwardly within the interior of the sealing conduit that the top cross wall 222 of the sealing conduit 122 connects to the open top end 121 of the fixed supply conduit 120.
comes into contact with.

Of course, before the first piston 82 reaches the lower limit position of the maximum allowable stroke as shown in FIG. The finger applied to the top is typically released before the complete stroke is accomplished. In many cases, finger pressure is released from the actuator button 90 at the lower or mid-stroke position of the complete depression stroke. The spring 240 thereby returns the pump 20 to its fully raised, inoperative position.

FIG. 16 shows the first pump in the pump chamber 80 immediately after the finger pressure on the actuator button 90 is released and in response to the pressure of the barb 240 pressing the poppet 150 against the first piston 82. The pump 20 is shown just after the piston 82 has started moving upward. As the poppet 150 moves upward, the seal conduit 190 initially remains in frictional engagement with the stationary supply conduit 120 and is free! This causes the poppet 150 to move away from the top of the seal conduit 190 to the extent permitted (ie, until the seal conduit 190 engages the spring 240). Communication is thus established between container 26 and pump chamber 80.

Top end of spring 240, seal conduit 190, poppet 15
0 and the piston 82 move upward together, the volume under the piston 82 is gradually increased. This reduces the pressure within the bonding chamber 80. As a result, the liquid inside the container, which is at substantially atmospheric pressure, overflows through the suction tube 30 to the top of the seal conduit 190, flows into the pump chamber 80, and flows into the pump chamber 80.
This chamber is then refilled as shown by flow direction arrow 297 in the figure. Liquid continues to flow from the container 26 into the pump chamber 80 until the first piston 82 reaches full ascending #.

Near the end of the return stroke of the first piston 82 toward its fully raised position, the bottom end of the seal conduit 190 separates from the stationary supply conduit 120 (FIG. 8) and additional liquid is released from this separation. The inside of the bonding chamber 80 is filled through the space.

In prior art storage pumps capable of dispensing more than a few caps, refilling the pump chamber typically relies on differential pressure operated structures such as flapper valves or ball valves. be exposed. According to the invention, an essentially mechanically actuated mechanism is provided that is not dependent on differential pressure. This active mechanical opening of the inlet passage leading from the source to the pump chamber ensures proper and rapid refilling under all conditions and circumstances.

Container venting liquid flows from the container 26 through the suction tube 30 to the pump 2.
Whenever pumping into the pump 20, atmospheric pressure must be maintained on the liquid remaining in the container 26 to allow the liquid to flow into the pump 20. For this reason, atmospheric air is allowed to flow into the container 26 whenever the first piston 82 is in a position lower than the fully raised position. As described in detail above in the section entitled "Description of Components and Arrangements of Components", the diameter of the upper portion of the first piston stem 86 is made smaller than the diameter of its lower portion, so that when the piston 82 is depressed, This allows atmospheric air to flow between the collar 38 and the piston stem 86. This atmosphere is then the 13th
The oil flows into the interior of the oil 26 through passages within the collar 38 as described in detail with reference to the figures. When the first piston 82 is pushed down to a position lower than the fully raised position? Since it communicates with the atmosphere, the first piston 82
Sufficient pressure will always be maintained at the top of the container 26 to force liquid into the vacuum region of the pump chamber 80 whenever the pump begins to return to its fully raised position.

Venting and Injection of the Pump Chamber The pump 20 of the present invention is novel and useful for venting air from the pump chamber as an aid to venting the mensochamber 80 of C. when the mensochamber 80 is initially devoid of liquid. Equipped with effective means. Especially the first
When the piston 82 is pushed downward into the pump chamber 80, which does not contain liquid, the air and/or vapor inside the chamber is compressed. However, because the Dunno Namber 800-capacity tomb is large and air and/or steam are highly compressible, the poppet piston surface 1
The pressure built up at the top of 72 is not large enough to overcome the force acting on spring 240. Therefore, the discharge passage 98 of the first piston 82 remains closed.

However, if the finger actuated on the actuator button 90 is released at or near the lower limit position of the maximum stroke of the first piston 82? Bed 150 is the seal conduit 1
90 in the direction in which it is released from the sealing engagement state with the top part (
That is, they are moved with the same spacing relationship as shown in FIG. 16). 0 pressurized air and/or steam is then forced under poppet 150 (in the opposite direction of liquid flow direction arrow 297 in FIG. 13) and seals conduit 19.
0 and is forced downwardly through the suction tube 30 and into the top of the container above the liquid in the container 26.

In this manner, the pressure within the membrane chamber is relieved or vented, and the chamber continues to admit the initial flow of liquid to be applied therein, as will be explained in more detail below.

The pump 20 is adapted to be able to inject at the end of the stroke without the aid of venting that would disrupt the sealing engagement formed, such as between the seal conduit 190 and the fixed supply conduit 120. be. It will be appreciated that this venting is accomplished without the use of prior art type venting devices. Such a device is included in the bonder chamber and would otherwise bypass or interrupt the sealing engagement between the pressurized parts at the end of the pressurization stroke. This venting structure of the present invention allows injection with partial (complete and no Vi) strokes (which is not allowed in pumps using prior art venting aids).

This structure of the invention also allows the pump assembly to be used to variably reduce output. Variable reduction of the output may be achieved by changing the skirt length of the button to shorten the stroke length, or by using various other devices to shorten the stroke length. Other such measures include lengthening pin 230 and inner conduit 246 to reduce stroke length. Venting is also efficiently achieved with short stroke pump assemblies. In contrast, this is not the case if a typical prior art vent assist KFi is used which is activated only at the full stroke limit position. The pump structure described herein makes it possible to obtain a reduced output lf by simply pressing down a reduced length stroke by hand.

Relieving pressure from pump chamber 80 allows liquid to flow into the chamber. In particular, the continuous upward movement of the components of the bong 7'20 tends to draw liquid out of the container 26. By stroking the first piston 82 several times over its full stroke, sufficient t of liquid is sucked into the pump chamber 80, and subsequent strokes cause it to be ejected as a fine spray, as described in detail above. It will be done.

In other prior art constructions, such as pumps of the type already described in U.S. Pat. The mating parts must form a particularly effective and tight seal during rotation 5K of the main piston. This sealing force must be relatively strong. This is because a relatively strong vacuum (low pressure) is created in the pump chamber when the main piston returns to the raised position (inactive position). This relatively strong vacuum is continuously drawn during the upward movement of the main piston until the poppet sleeve slides off the top of the suction conduit located near the end of the return stroke of the pump. Continue. In this regard, the relatively strong vacuum within the pump chamber can be channeled into the external atmospheric pressure air to relieve the internal vacuum. The liquid in the container cannot be drawn into the pump chamber until near the end of the pump's upward stroke and the poppet is disengaged from the sealing conduit, so that the main piston does not return upwardly. A very strong vacuum will exist throughout most of the stroke. This strong vacuum creates a pressure differential across the seal between the main piston and the inner surface of the pump chamber. This seal is also susceptible to air leaking from the outside of the pump to the inside.

In fact, commercial pumps made according to the teachings of US Pat. No. 4,025,046 typically include a special top seal that seals the main piston against the interior surface of the pump chamber. This seal imposes a very large frictional load on the pump actuator. Therefore, this spring in the pump is able to fully resist the very large frictional forces between the main piston and the pump chamber wall, as well as the pressure difference that occurs when the piston moves upwards. The spring must be strong enough to return the pump actuator to the raised position. This spring must be dimensioned as much as the button necessarily in order to exert sufficient upward force, and the force exerted to push the actuator down against the force of the spring is necessarily large. Under such circumstances, such pumps cannot be operated effectively, for example, if the pump has to be operated by a young child or an elderly person with poor finger skills.

Compared to the pump made by the above-mentioned U.S. Pat. No. 4,025,046, the pump according to the present invention uses relatively weak springs and is therefore easier to operate by young children and the elderly. It can be done. The reason why a weak spring can be used in the pump of the present invention is that the first piston 82 is moved during the return stroke [1! As a result of the vacuum degree (low pressure) created within the pump chamber 80 when the first piston 82 and the pump chamber 80 move upward, the first piston 82 and the pump chamber 80
This is because sealing between the inner surface and the inner surface of the material can be made quite easily.

The pump of the present invention operates effectively by slightly emptying the inside of the pump chamber 80. This is because the poppet 150 is moved upwardly out of sealing engagement with the top of the seal conduit 190 when the finger applied to the actuator button 90 is released. Liquid from the container thus flows upwardly within the suction tube 30, over the top of the seal conduit 1190, and into the Imp chamber 80. This results in filling of the pump chamber substantially immediately after the force on button 90 is released and the twelfth stone 82 begins to rise toward its fully raised position.

Therefore, when the first piston 82 is at or near the lower limit position of the downward stroke, the actuator button 9
What if the force is released from 0? Refilling of the pump chamber 80 will begin even while the first piston 82 is positioned substantially in its lowest position within the pump chamber.

As the first piston 82 moves up the pump chamber 80, the incoming liquid flows into the first piston 82 at substantially atmospheric pressure.
into the pump chamber 80 below. The degree of vacuum remaining below the first piston 82 is relatively small, and the differential pressure between the pressure in the pump chamber 80 below the first piston 82 and the atmospheric pressure above the first piston 82 is The target is maintained as a small pressure. 1st piston 821ktjl! Since the pressure difference between the first piston 82 and the pump chamber 80 is relatively small, the seal between the first piston 82 and the wall of the pump chamber 80 can be made relatively small. The force exerted by the frictional engagement with the wall surface becomes relatively small.Since this ts frictional engagement force is small, the force of the spring 240 can also be reduced.

This spring is only required to overcome the forces of the relatively small pressure differential caused by the relatively small lIl friction forces and the relatively small vacuum in the membrane chamber. The use of a relatively weak spring 240 makes the pump easier to operate by children and the elderly.

From the detailed description of the invention and its illustrated embodiments, it will be readily appreciated that numerous changes and modifications can be made without departing from the spirit and scope of the novel concepts and principles of the invention.

[Brief explanation of the drawing]

FIG. 1 is an elevational view, partially in section, of a finger-actuated pump of the present invention, shown connected with a section of broken suction tube, and with the top of the container shown in dotted lines; FIG. 3 is an elevational view shown installed inside a lid cap mounted on top of the lid. FIG. 2 is a cross-sectional view (looking up) roughly along plane 2-2 of FIG. FIG. 3 is a cross-sectional view (looking up) roughly along plane 3-3 of FIG. FIG. 4 is a cross-sectional view (looking up) taken generally along plane 4-4 of FIG. FIG. 5 is a cross-sectional view (looking up) taken generally along plane 5-5 of FIG. @Figure 6 is a sectional view (looking up) roughly along line 6-6 in Figure 1. FIG. 7 is a sectional view (looking up) along the surface 7-7 of the first @. FIG. 8 is an enlarged view of the pump with components positioned as shown in FIG. 1; Figures 9, 10, 11, 11A, 12 and 16 are similar to Figure 8 showing sequentially moved positions of pump components to illustrate the pump operating sequence. Enlarged view. 20...Pump, 22...Cap, 26...Container, 30...Suction tube, 32...Opening, 38 River collar 48...Housing, 62-...Notch, 68
...-annular groove, 70... radial groove, 74 ridge 'J de,
80... Pump chamber 82-mounted first piston, 8
6... Stem, 90... Head or button, 98 outlet passageway, 12°... Supply conduit, 150... Poppet, 162... First valve means, 190... Seal conduit, 218 ...Contact peripheral surface, 2...Cross wall portion, 0...Poppet bottle, 0...Spring, 0...Annular seal.

Claims (1)

[Scope of Claims] (1) A pump chamber, a supply conduit communicating with the pump chamber, and a movable seal conduit slidably and sealingly engaged with the supply conduit in a telescoping relationship. a first piston operatively disposed within said pump chamber to define a discharge passageway therefrom; and first valve means for closing flow through said discharge passageway; a poppet having second valve means for closing flow therethrough; and a null movement for allowing limited relative movement between said poppet and the sealing conduit between first and second limit positions thereof. It is a means,
(1) forcing the first valve means of the poppet against the first piston; and (2) engaging the poppet and seal conduit at least when the poppet and seal conduit are in the first limit position. A finger-operated pump characterized in that it is configured to include the above-mentioned idle motion means including a spring means. 2. The finger actuated pump of claim 1, wherein said spring means includes only one helical compression spring. (3) said spring means includes a single spring operatively arranged to engage the poppet but not the sealing conduit when said poppet and sealing conduit are in said second limit position; A finger-actuated pump as claimed in claim 1, comprising: (4) said poppet comprising: (1) an upper portion forming said first valve means;
) a lower portion forming said second valve means; and (3) adapted to be pressurized by fluid in said pump chamber, thereby causing said first valve means to be compressed by the action of said spring means. 2. The finger actuated pump of claim 1, further comprising: an upwardly directed piston surface adapted to be moved against a force to open the discharge passageway. (5) said poppet having a concave valve member face forming said second valve means, and said sealing conduit passing through said concave valve member face in engagement with said concave valve member face; an upper end with a contacting circumferential surface adapted to close flow, the lost motion means further comprising: (1) a concave valve member surface of the poppet; of said sealing conduit acting as part of said idle movement means to limit relative movement at said second limit position of said relative movement when closing said flow. 5. A finger-actuated pump according to claim 4, comprising: a contact surface. (6) the spring means comprises a helical compression spring having a lower end maintained in a fixed vertical position relative to the pump chamber and a movable upper end at least partially engaged with the poppet; and wherein the upper end of the spring extends radially beyond at least a portion of the poppet with the seal conduit and poppet in the first limit position of relative movement. 6. The finger actuated pump of claim 5, wherein the finger actuated pump has at least a portion that engages the seal conduit. (7) the degree of limited relative movement between the poppet and the seal conduit includes: (1) a line of contact between a concave valve member surface of the poppet and a contact peripheral surface of the seal conduit; and (2) a line of contact between a contact circumferential surface of the seal conduit and a surface of a concave valve member of the poppet; and a line of contact between the spring and the sealing conduit. (8) said spring means includes a helical compression spring having a lower end maintained at a fixed height relative to said pump chamber and a movable upper end at least partially engaged with said poppet; , the upper end of the spring is arranged so that the seal conduit and poppet are in the first
at least one of said poppets in the limit position of
2. The finger actuated pump of claim 1, further comprising at least a portion extending radially beyond the portion to engage the sealing conduit. 9. The spring is a helical spring, and the poppet includes at least one rib extending radially outwardly to at least partially engage the spring. finger operated pump. (10) the sealing conduit has an upper end defining a generally smooth circular opening, the poppet having a downwardly projecting pin disposed within the opening of the sealing conduit; The poppet pin further includes a plurality of circumferentially spaced ribs extending radially outwardly and forming a plurality of grooves for receiving fluid flow past the poppet pin. A finger-actuated pump according to claim 1, wherein (11) The supply conduit includes a fixed cylindrical tube, the tube projects upwardly inside the pump chamber and terminates at an open upper end. finger operated pump. 12. The finger actuated pump of claim 11, wherein the movable sealed conduit includes a generally cylindrical hollow wall. 13. The finger actuated pump of claim 12, wherein said generally cylindrical hollow wall of said seal conduit is adapted to engage an outer surface of a cylindrical tube of said supply conduit. 14. The finger actuation of claim 13, wherein the hollow wall of the seal conduit includes an inwardly projecting annular seal adapted to engage an outer surface of the cylindrical tube of the supply conduit. formula pump. (15) When the pump is in an inoperative state, the spring means constantly presses the poppet together with the engaged first piston and the seal conduit toward the raised position; 15. A finger actuated pump as claimed in claim 14, spaced upwardly from the open upper end of the cylindrical tube of the supply conduit. (16) the seal conduit has an upper cross wall formed with an aperture through which fluid flows as the first piston and poppet move upwardly within the pump chamber; 13. A finger-actuated pump as claimed in claim 12, wherein the pump is adapted to flow to refill the pump chamber. (17) the spring means includes a helical spring, the helical spring (1) having a lower end disposed within the cylindrical tube of the supply conduit, and (2) extending upwardly from the cylindrical tube of the supply conduit; and (3) an upper end protrudes inside a cylindrical hollow wall of the sealing conduit, and the poppet is inserted through an opening in the cross wall of the sealing conduit and inside the upper part of the helical spring. 17. The finger actuated pump of claim 16, including a pin projecting downwardly to maintain axial alignment of the spring. (18) the hollow cylindrical wall of the seal conduit includes outwardly projecting circumferentially spaced guide ribs, the ribs slidably contacting the inner surface of the pump chamber; 13. The finger actuated pump of claim 12, maintaining axial alignment of the sealed conduit. (19) During the engagement between the movable seal conduit and the supply conduit during the downward stroke, the movable seal conduit is configured to maintain its sealing engagement with the seal conduit over the entire length of the downward stroke; A finger-actuated pump according to claim 1, wherein the finger-actuated pump continuously maintains . (20) a pump chamber, a supply conduit communicating with the pump chamber, slidably disposed within the pump chamber, forming a discharge passage from the pump chamber, and supplying liquid from the pump chamber through the discharge passage; a movable seal conduit slidably and sealingly engaged with said supply conduit; and a poppet comprising: (1) said first piston means adapted to close said discharge passageway; (2) moving said poppet in a direction away from said first piston means to space said first valve means from said discharge passageway, thereby spacing said first valve means from said discharge passage; (3) a piston surface that is pressurized to allow liquid to flow; and (3) adapted to be movable relative to the sealing conduit and to close flow therethrough from the pump chamber. a second valve means having a second valve means; a poppet having a second valve means; a pressing means for pressing the poppet against the first piston means to seal the discharge passageway with the first valve means; the poppet and the sealing conduit; and forming a lost motion structure between the poppet and the seal conduit to allow a limited degree of relative movement between the poppet and the seal conduit between first and second limit positions thereof. means including a portion of said pushing means arranged to simultaneously engage said poppet and sealing conduit in said first limit position of said relative movement; Thus, in the first limit position of relative movement, flow is allowed through the sealing conduit by the second valve means;
and said idle movement means adapted to prevent flow through said seal conduit by said second valve means in said second limit position of said relative movement. Finger operated pump. (21) the supply conduit has an upper end projecting into the pump chamber and defining an outlet opening; the poppet has a flange with an upwardly directed annular surface forming the piston surface; the poppet flange has a downwardly directed concave valve member surface forming the second valve means, the movable seal conduit being (1) telescopically fitted within the upper end of the supply conduit;
(2) a generally cylindrical hollow wall adapted to slidably seal into engagement with the supply conduit; and (2) a contact periphery of a face sealingly engaged upper end of a concave valve member of the poppet. 21. The finger actuated pump of claim 20, comprising: a surface. (22) A finger-operated pump for discharging liquid from a suction tube extending into the interior of a container containing liquid, the supply conduit means forming a liquid flow path, the upper end of said suction tube said supply conduit means having an open lower inlet end adapted to communicate with said liquid and having an open upper outlet end for discharging said liquid; a pump chamber means forming a pressurizable chamber about an outlet opening at an upper end of said supply conduit means; and said pump chamber means being sealably and slidably disposed within said pump chamber means and capable of reciprocating movement therein. first piston means adapted to pressurize the liquid within the pump chamber means when moved towards the supply conduit means;
evacuation passage means for forming a liquid evacuation passage from the pump chamber means through the first piston means; and a seal with the supply conduit means in at least a portion of the movement of the first piston means toward the supply conduit means. a movable seal conduit means slidably engaged in the condition and defining an opening in the upper end for discharging said liquid; and a poppet, comprising: (1) with said poppet: (a ) a closed position relative to said first piston means to close flow through the discharge passage means within said first piston means; (b) a closed position relative to said first piston means to permit flow through said discharge passage means within said first piston means; (2) a first valve means adapted to be moved between an open position remote from said first piston means; and (2) said seal conduit means while said pump chamber means is gradually pressurized. a second valve means movable together with the first valve means adapted to engage the upper end of the sealing conduit means to prevent backflow through the upper end opening; and pressing the poppet to open the first valve means.
pressing means for locating the closed position relative to the piston means; and forming a lost motion structure between the second valve means and the movable seal conduit means so that the second valve means and the seal conduit means (1) a fully open first position permitting flow through the upper end opening of said sealing conduit means; (2) the upper end opening of said sealing conduit means; a fully closed second position for closing back flow through the valve, wherein the second valve means and the sealing conduit are in the fully open position; and a finger comprising: said lost movement means comprising a portion of said pushing means positioned to simultaneously engage a portion of said second valve means and said sealing conduit; Actuated pump. (23) said poppet further being formed with an upwardly facing piston surface and adapted to be pressurized to be moved downwardly away from said first piston means; Claim 1, wherein the first valve means is spaced apart from the discharge passageway to permit flow therethrough when a predetermined pressure is present in the pump chamber. 23. The finger-actuated pump according to paragraph 22. (24) While the movable seal conduit means is engaged with the supply conduit means during the downward stroke, the movable seal conduit remains in sealing engagement with the supply conduit means for the entire length of its downward stroke; 23. A finger-actuated pump according to claim 22, wherein the finger-actuated pump maintains continuous and unimpaired. (25) a pump chamber; a supply conduit communicating with the pump chamber; and a movable seal conduit slidably and sealingly engaged with the supply conduit in a telescoping relationship; a first piston operatively disposed in the chamber to define a discharge passageway from the chamber; and a first valve means for closing flow through the discharge passageway; and a first valve means for closing flow through the sealing conduit. a poppet having two valve means, a pressing means for pressing a first valve means of said poppet against said first piston, and a first valve means for restricting relative movement between said poppet and a sealing conduit; and a null movement means for enabling simultaneous engagement of the poppet and the seal conduit in the first limit position of the relative movement. A finger-operated pump characterized in that the finger-operated pump is configured to include: the idle movement means including a part of the pressing means positioned at (26) The pushing means is operatively arranged to engage the poppet but not the seal conduit when the poppet and seal conduit are in the second limit position. A finger-actuated pump according to paragraph 25. (27) said poppet having (1) an upper portion forming a first valve means; (2) a second valve means;
(3) an upwardly directed piston surface to be pressed by the liquid in the pump chamber, the pressing force causing the first valve to move against the force of the pressing means; 26. A finger actuated pump as claimed in claim 25, comprising: said piston surface adapted to move said valve means to open said discharge passageway. (28) said poppet having a concave valve member face forming a second valve means, and said sealing conduit engaging said concave valve member face for flow through said sealing conduit; a contact periphery at the upper end adapted to close the flow, the contact periphery being adapted to close the flow when the concave valve member face of the poppet and the contact periphery of the sealing conduit are engaged to close the flow; 28. A finger actuated pump as claimed in claim 27, acting as part of said idle movement means limiting its relative movement at a second limit position of movement. (29) The pressing means comprises a helical compression spring having a lower end maintained at a fixed height position with respect to the pump chamber and a movable upper end at least partially engaged with the poppet. and wherein the lost motion means extends radially beyond at least a portion of the poppet when the seal conduit and poppet are in the first limit position of relative motion. 29. The finger actuated pump of claim 28, including at least a portion of the upper end of the spring engaging the sealing conduit. (30) the limited relative movement between the poppet and the seal conduit includes: (1) a line of contact between a concave valve member surface of the poppet and a contact peripheral surface of the seal conduit; a greater axial distance between a spring and a line of contact with a seal conduit; and (2) a line of contact between a contact circumferential surface of the seal conduit and a surface of a concave valve member of the poppet;
and a line of contact between the spring and the sealing conduit. (31) The pressing means includes a compression spring having a lower end maintained at a fixed height position relative to the pump chamber and a movable upper end at least partially engaged with the poppet. , said lost motion means extending radially beyond at least a portion of said poppet when said seal conduit and poppet are in said first limit position of relative movement; including at least a portion of the upper end of the spring engaging the seal conduit and disengaging from the seal conduit when the seal conduit and poppet are in the second extreme position of relative movement. 26. A finger-operated pump according to claim 25, wherein the pump is adapted to be uncoupled. 32. The spring is a helical spring, and the poppet includes at least one rib extending radially outwardly to at least partially engage the spring. finger operated pump. (33) the sealing conduit has an upper end defining a generally smooth circular opening, the poppet having a downwardly projecting pin disposed within the opening of the sealing conduit; The poppet pin further includes a plurality of circumferentially spaced ribs extending radially outwardly and forming a plurality of grooves for receiving fluid flow past the poppet pin. 26. A finger-actuated pump according to claim 25.