CN1069232C

CN1069232C - Collapsible pump chamber having predetermined collapsing pattern

Info

Publication number: CN1069232C
Application number: CN94192584A
Authority: CN
Inventors: R·J·彼得森; R·E·施塔利
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1993-06-24
Filing date: 1994-04-18
Publication date: 2001-08-08
Anticipated expiration: 2014-04-18
Also published as: JPH08511723A; EP0705144B1; MXPA94002797A; WO1995001226A1; CA2165314C; DE69411919T2; ATE168594T1; EP0705141B1; DE69420730T2; BR9406962A; WO1995000253A1; AU678463B2; KR960703353A; AU7091794A; ES2135586T3; JPH08511988A; CA2165314A1; AU6559594A; CN1125916A; ES2118403T3

Abstract

The present invention provides a retractable pump chamber, such as a bellows (40), for a liquid dispensing pump device. The retractable pump chamber includes a retractable sidewall that constitutes a portion of the internal volume of the pump chamber. The retractable sidewall has a structure that extends and retracts in a predetermined pattern when the pump device is actuated. For example, this predetermined pattern of retraction results in a relatively small change in internal volume initially over a given stroke length, followed by an increased change in internal volume over the same stroke length. Therefore, the pump device provides good control over the amount of product dispensed initially and precise control during partial actuation. However, the same pump device can also deliver large volumes of product during full actuation.

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Description

Collapsible pump chamber with predetermined flexible pattern

Background of invention

1. invention field

The present invention relates to be used for the manual collapsible pump chamber of consumer goods liquid distributing pump device.

2. the description of prior art

The known liquid distributing pump device that is used on the consumables container has varied.These dispensing pumps can be used for for example transmitting liquid with foam, spraying or liquid bundle (for example being used to increase the cleaning of moisture content) form.Prevailing this dispensing pump device adopts the cylinder shape pump chamber of piston.This pump chamber requires to keep liquid motion sealing between piston and cylinder.There is common shortcoming in this liquid sealing.For example produce sizable friction during to cylinder moving when piston, this is because these parts must cooperate closely to form sealing.Scheme in addition or as an alternative, each parts itself must be manufactured in the strict tolerances and form sealing so that each parts suitably cooperates.In addition, the arbitrarily passing of time, the wearing and tearing that cause because of friction can make this sealing worsen, thereby reduce the efficient of pump.In addition, these pistons and cylinder distributor are not all made enough effort usually to reduce number of components and parts and totle drilling cost when design.

To a certain extent, according to some shortcoming of piston and air-cylinder type pump, several liquid distributing pump devices that have the pump chamber of flexible wall have been developed.For example, adopted balloon shape pump chamber.More at large, the elasticity bellows of employing activity as the collapsible pump chamber in the liquid distributing pump device.The pump of this bellows type allows pump chamber to expand on volume and shrinks, and does not have the shortcoming of motion sealing required in piston and the cylinder pump.In addition, these bellows can replace piston, cylinder and spring, have therefore reduced molded and assembly cost.U.S. Pat 4,336,895 prior art relates to a kind of manual activation liquid distributing pump device assembly that is used for, it is a kind of collapsible pump chamber that is used for manual activation liquid distributing pump device, it comprises that one constitutes the internal capacity part of this pump chamber and have a ripple annular sidewall that is fit to by the flexible structure of preassigned pattern when this pump installation activates, or a kind of manual activation dispensing pump device that is used for also discharging by a tap from a supply container pumping liquid liquid, particularly openly have the dispensing pump that fluid product is received to axial compression bellows from supply container.Yet the liquid distributing pump device of these prior arts does not have the present invention's all these advantages described herein.

Summary of the invention

Content according to an aspect of the present invention, a kind of collapsible pump chamber that is used for manual activation liquid distributing pump device is provided, it comprises: one constitutes the internal capacity part of this pump chamber and have a ripple annular sidewall that is fit to by the flexible structure of preassigned pattern when this pump installation activates, it is characterized in that, should predetermined flexible pattern causing having in every given haul distance when initial volume-variation in the relatively little internal capacity part, and then is the internal capacity that the increases volume-variation in partly in every given haul distance.

Content according to a further aspect of the invention, a kind of manual activation dispensing pump device that is used for also discharging by a tap from a supply container pumping liquid liquid is provided, it is except that comprising above-mentioned collapsible pump chamber, also comprise: (a) one in order to installing to the dispensing pump device hermetically the housing on the supply container, and a fluid passage part that provides fluid to be communicated with from supply container downstream to tap is provided this housing; (b) inlet valve that is positioned at this fluid passage, this valve are closed to prevent that liquid stream from flowing through this valve and open this valve during negative downstream pressure during the positive downstream pressure; (c) outlet valve that is positioned at this fluid passage, this outlet valve are opened to allow liquid stream flowing through this valve during the positive upstream pressure and close this valve during negative upstream pressure.

Specification can be believed to list and discriminatively the present invention to be proposed the claim end of protection domain in detail, will understand the present invention better from following explanation in conjunction with the accompanying drawings, wherein:

Fig. 1 is used for the decomposition diagram that the most preferred embodiment of the manual collapsible pump chamber of liquid distributing pump of the present invention is seen from top;

Fig. 2 is the liquid distributing pump of Fig. 1 and the decomposition diagram that manually flexible pump chamber is seen from below;

Fig. 3 is the cutaway view that the center line of the liquid distributing pump device (having original protruding handle of anti-abuse and shipping seal) along the assembling shown in Fig. 1 and 2 is cut open;

Fig. 4 has removed the cutaway view similar in appearance to Fig. 3 that the protruding handle of anti-abuse and shipping seal are in opening;

Fig. 5 is when collapsible pump chamber is flexible, and during down stroke, pump shown in Figure 1 is when work, similar in appearance to the cutaway view of Fig. 3;

Fig. 6 is when collapsible pump chamber is flexible, and during upward stroke, pump shown in Figure 1 is when work, similar in appearance to the cutaway view of Fig. 3;

Fig. 7 is the cutaway view of another preferred collapsible pump chamber of the present invention of the liquid of energy pumping relatively high capacity in another liquid distributing pump device similar in appearance to Fig. 3;

Fig. 8 is the cutaway view similar in appearance to Fig. 3 of the collapsible pump chamber shown in Figure 7 in the liquid distributing pump device shown in Figure 1.

Detailed description of the present invention

Implement to the invention provides a kind of manual compressible pump chamber 40 that is used for liquid distributing pump device (collectivity mark is 20) among the embodiment in the best shown in Figure 1.This dispensing pump device 20 especially can use with fluid product supply container 22 (part shown in Fig. 2).This illustrated liquid distributing pump 20 mainly comprises a upper shell 24, one lower houses 26; One outlet valve member 30 and an import valve member 34, one sag pipes 38 and a collapsible pump chamber 40.

Term used herein " collapsible pump chamber " is defined as such pump chamber, and promptly this pump chamber to small part is surrounded by elastic wall; This elastic wall moves by this way in response to Manual pressure, and promptly the volume in this pump chamber reduces and do not have sliding friction between any element that constitutes this pump chamber.Such collapsible pump chamber can comprise the diaphragm of balloon shape and by such as thermoplastic elastomer (s), the bladders that elasticity thermosets (comprising rubber) is made etc.(not shown) for example, this collapsible pump chamber can comprise (or being covered by this elastomeric material) spirality metal or the plastics spring around a kind of elastomeric material; Thereby produce the pump chamber of a sealing.Yet this illustrated and preferred collapsible pump chamber is a kind of bellows 40, and for example a kind of about cylinder type hollow structure has the wall of concertina.Because it is flexible that each bellows can be made into, as a spring action, so each bellows has been cancelled the needs to spring.In addition, this collapsible pump chamber is design like this, and promptly it stretches according to predetermined pattern.In addition, this manual collapsible pump chamber preferably also comprises each global facility that adds.The used term " integral body " of this literary composition is defined as molded or is configured as single inseparable parts.

Referring to Fig. 3, upper shell 24 is socketed on the lower house 26, and is clamped by the auxiliary section between annular lip 25 and the circumferential rib 27.This lower house 26 comprises this pump installation 20 is connected to screw thread 28 on the container 22 hermetically.In addition, this lower house 26 can adopt bayonet coupling structure (not shown), for example authorize people's such as Dunning United States Patent (USP) 4781311 on November 1st, 1988 or authorized on October 7th, 1975 described in the United States Patent (USP) 3910444 of Foster like that.

In addition, lower house 26 comprises an intake channel 42 with an inner conical import valve seat 35, and this valve seat 35 cooperates formation inlet valve 34 and 35 with import valve member 34.In addition, this lower house 26 comprises three spacing protruding handles 36 that uniformly-spaced are provided with, and this protruding handle 36 carries out spacing at pump installation 20 duration of works to import valve member 34 as described below.In addition, also can use the ball valve (not shown).This lower house 26 also comprises 37, three 44, one flange connectors 45 of actuating flange that uniformly-spaced are provided with of passage and three anti-rotating flanges 46 that uniformly-spaced are provided with.Frictionally be engaged on the intake channel 42 of lower house 26 is a sag pipe 38 that stretches into down in the container 22.

Upper shell 24 comprises an exit passageway 48 that ends in the dispensing orifice 50.One inner cylindrical wall 52 is angled and be positioned at upper shell 24 and be connected with this exit passageway 48 with relative exit passageway 48.In addition, (as shown in Figure 2), this upper shell 24 had a flange 25, and this flange 25 has three 58, one excrescences 60 of 56, three pairs of tactile convex bodys of 54, three stop-motion bodies of actuation channel and the protruding handles 62 of dismountable anti-abuse of uniformly-spaced being provided with.The evidence that provides pump to activate in advance is provided term used herein " anti-abuse "; When not abused, product do not need (because of the entire pump device can be backed out and change).Say that on this meaning the abuse evidence is important, because it does not encourage to carry out the product sampling from shelf.In addition, this

housing

24 and 26 can be included in pump installations 20 have been removed in known expression in the prior art from container 22 any anti-abuse feature (not shown).

By

housing

24 and 26 be a fluid passage that constitutes by several sections, comprise sag pipe 38, the intake channel 42 of lower house 26, the exit passageway 48 of upper shell 24 and collapsible pump chamber 40.This fluid passage makes from the end of sag pipe 38 in supply container 22 and keeps fluid to be communicated with along downstream direction to tap.Term used herein " downstream " is defined as from supply container 22 to tap 50 direction, and " upstream " then defines by 22 the direction from tap 50 to supply container.Similarly, term used herein " entrance point " is meant the upstream, and " port of export " is meant downstream.

The partially liq passage is to be limited by collapsible pump chamber 40 to form.But this collapsible pump chamber 40 has a kind of structure of flexible manual compression, therefore reduces the volume in collapsible pump chamber 40.Although can use the spring (not shown) to be back to initial configuration with auxiliary this collapsible pump chamber 40, this collapsible pump chamber 40 itself preferably has enough elasticity, thereby can be back to its initial configuration behind manual compression power removal.

This collapsible pump chamber is to guarantee the bellows 40 of these bellows 40 by the flexible structure of preassigned pattern a kind of having.Usually, these bellows 40 preferably have several mass parameters.For example, these bellows 40 should make this pump installation be easy to activate.This just usually mean these bellows have from about 3 pounds to about 5 pounds elastic force.These bellows 40 also should have excellent elasticity, minimum lag and creep.In addition, these bellows 40 are preferably in radial direction and have good rigidity (hoop strength), to guarantee these bellows 40 radial deformation do not take place in normal working conditions.At last, these bellows 40 preferably have good volumetric efficiency, i.e. the variation of the internal capacity that gets divided by the internal capacity of complete expansion.

Some geometric properties that can be used to make these bellows 40 possess suitable quality quality comprise the diameter of bellows 40.Diameter is big more, and elastic force is low more, and radial rigidity is also low more.Although wish that all bellows have lower elastic force usually, lower radial rigidity is a problem really, and for example, these bellows 40 can leak gas suddenly in precompression plate machine formula sprayer.The wall thickness that increases the ripple place will increase radial rigidity, but this can increase elastic force, thereby cause the volumetric efficiency of these bellows to reduce.Reducing moire angles usually can reduce elastic force but also reduce volumetric efficiency.This moire angles is the angle of convergence at two angles, and these two jiaos is perpendicular to angle above the line of axis and the starting point by ripple and the angle below this line.The moire angles that is preferably in this normal top is about 45 ° (make these bellows removal from the core pin easier) for the moire angles of about 30 ° of these normals below.Increase ripple quantity will reduce elastic force and also reduce volumetric efficiency.

Although do not wish retrained by following factors, the Main Ingredients and Appearance that should believe elastic force is a wall thickness, moire angles up and down, and main elasticity composition is the selection of material.Therefore, a kind of mode that makes these bellows at first have telescopic part (smaller diameter portion of bellows 40 among the figure) is exactly to utilize thinner wall and sharper moire angles in these zones.In fact, as shown in Figure 3, sidewall attenuation gradually to the top of diagram bellows 40 from the bottom.Correspondingly moire angles becomes sharper angle gradually.Therefore, stretch in 40 beginnings in the top of this bellows but distribute less relatively volume, so can carry out good control to low capacity.Along with this pump installation 20 continues to activate and suppose the actuation speed that keeps constant, then flow will increase gradually.

The selection of material also can be assisted and be made these bellows 40 have suitable quality quality.Usually, this material preferably has the material that Young's modulus is lower than 10000psi.For scavenging pump, it is better that the Young's modulus of material is lower than 3000psi.Material should keep desired mechanical performance and stable size also can resist stress fracture.These characteristics all should possess with air and with fluid product the time.Therefore, for the plate machine formula sprayer that is generally used for spraying the acid that comprises a large amount of water or alkali cleaning products, its material should the insensitive and effect that can not be hydrolyzed to the pH value.The example of this material comprises: polyolefin is polypropylene, low density polyethylene (LDPE), very low density polyethylene, ethylene-vinyl acetate fat for example.Spendable other material comprises thermosetting (as rubber) and thermoplastic elastomer (s).The material that plate machine formula sprayer preferably adopts is that to have vinyl acetate content be macromolecule ethylene-vinyl acetate fat between about 10% and 20%.May not have problems for other pump (for example scavenging pump) pH value and hydrolysis.It may be prior replacing low elasticity power with high resiliency.In this case, better with the polyethylene of low modulus ethylene-vinyl acetate fat or extra-low density.

The entrance point of this manual compressible pump chamber 40 is connected on the substantial cylindrical inwall of lower house 26 by frictional fit.When connecting, three notches 47 that uniformly-spaced are provided with on bellows 40 entrance points cooperate with three anti-rotating flanges 46 on the lower house 26.This collapsible pump chamber 40 comprises near the flange 64 of an integral ring-shaped stretching, extension its entrance point.The inner surface of this flange 64 and lower house 26 is against sealing, thereby forms a breather valve 26 and 64.Therefore, this

breather valve

26 and 64 comprises flange 64 that is used as valve member and the lower house 26 that valve seat is provided.

Similarly, the port of export of collapsible pump chamber 40 is connected on the inner cylindrical wall 52 of upper shell 24 by frictional fit.The port of export of this collapsible pump chamber 40 comprises an elongated passageway 66 that has a whole outlet valve seat 32, and this valve seat 32 cooperates

formation outlet valve

30 and 32 with outlet valve member 30.This elongated passageway 66 also comprises holistic outlet opening 68.

Import valve member 34 and 35 and

outlet valve member

30 and 32 be arranged in fluid passage.These valves can be the valves of any kind commonly known in the art, comprise duck-beak type valve, ball valve, lift valve or the like.This outlet valve member 30 preferably provides the light weight ball valve element or the poppet valve element of suck-back effect discussed below.

As shown in Figure 3, liquid distributing pump 20 is in the closed position, and in this position, the outlet opening 68 of bellows 40 is not aimed at exit passageway 48, thereby forms the fluid transport sealing.This shipping seal comprises several function element, i.e. outlet opening 68 and relative outlet opening 68 movable cylindrical walls 52, thus outlet opening 68 is sealed up.Therefore, the fluid passage of exit passageway 48 that flows through intake channel 42, bellows 40 and the upper shell 24 of sag pipe 38, lower house 26 is sealed thickly to be sealed up, thereby forms shipping seal.

In addition, when shipping seal seals, activate flange 44 and actuation channel 54 misalignment that stop pump installation 20 to activate.Do not have this feature, when shipping seal seals, attempt to damage collapsible pump chamber 40 the pressure increase of actuating cause in collapsible pump chamber 40 of pump installation 20.At detent position, each side that activates flange 44 upper ends is positioned at against the position of an end of living each stop-motion body 56.Each opposite side that activates flange 44 is positioned at against living one of tactile convex body 58 position.

In addition, prevent the protruding handle 62 of abuse normally flatly stretched lower house 26 from upper shell 24 top.The protruding handle 62 of illustrated anti-abuse comprises a line of rabbet joint 63 that cooperates with lock flange 45, thereby prevents that upper shell 24 from rotating relative to lower house 26.Therefore, removal should anti-ly not abused protruding handle 62, and shipping seal just can not be opened.In addition, removal should anti-ly not abused protruding handle 62, and pump installation 20 can not activate.

As shown in Figure 4, liquid distributing pump 20 is in the enable possition.In case the protruding handle of anti-abuse 62 is by removal, then upper shell 24 just relatively lower house 26 go to the enable possition from the closed position.Should can pass through it is rotated and removal simply up by the protruding handle 62 of anti-abuse.This rotation interacts the protruding handle 62 of protrusion 60 and anti-abuse, thereby produces an active force that protruding handle 62 is pushed away upper shell 24.This active force makes this protruding handle 62 along this protruding handle 62 is connected to the fine rule on this upper shell 24 and breaks away from this upper shell 24.Therefore, because this active force,, continue this protruding handle 62 of rotation and will cause that this protruding handle 62 ruptures if this protruding handle 62 rotates to the point that the locking line of rabbet joint 63 and lock flange 45 are unclamped.Therefore, before protruding handle 62 fractures of this anti-abuse, this shipping seal can not be opened.Therefore without a doubt, this comes not stay from the sampling of fluid product shelf the evidence of this sampling with regard to having prevented by the actuating of pump installation 20.

Along with upper shell 24 rotation, each activates flange 44 and moves to from the position against a stop-motion body 56 against being separated by 90 ° the position of adjacent stop-motion body 56.During turning, each activates flange 44 facing to 58 motions of tactile convex body, sense of touch and/or sense of hearing formula signal that this convex body 58 provides the shipping seal (at first from the closed position again to the enable possition) of this dispensing pump device 20 moving.This tactile convex body 58 makes this pump installation 20 remain in unlatching or closed position by interacting also can assist with actuating flange 44.

Referring to Fig. 4,, activate flange 44 and aim at actuation channel 54 in the enable possition.In addition, monoblock type dispensing orifice 68 is aimed at exit passageway 48, thereby opens fluid passage.When upper shell 24 relative lower houses 26 rotated, upper shell 24 is bellows 40 rotations relatively also.Part is because cooperating between the anti-rotation flange 46 of groove 70 and the lower house 26 on the entrance point of bellows 40, and these bellows 40 relative lower houses 26 maintenances are static.On the contrary, with before exit passageway 48 is aimed at, the elongated passageway 66 of bellows 40 rotates in the inner cylindrical wall 52 of upper shell 24 until outlet opening 68.

Referring to Fig. 5, in case pump installation is in the enable possition, it facilitates and is used for manual activation.The manual activation of this pump installation makes upper shell 24 relative lower houses 26 make axially reciprocating and realize.When this reciprocating motion is finished, activate flange 44 and in actuation channel 54, slide.Reciprocating during down stroke at this, import valve member 34 is sealed on the import valve seat 35.This will cause that the pressure in the collapsible pump chamber 40 increase, thereby cause that outlet valve member 30 motions leave outlet valve seat 32, thereby open outlet valve 30 and 32.Therefore, the liquid that is positioned at the collapsible pump chamber 40 that reduces volume distributes discharge by monoblock type outlet opening 68 and exit passageway 48.When this liquid was assigned with discharge, it provided masterpiece upwards to be used for outlet valve member 30, made the end motion of outlet valve member 30 towards monoblock type elongated passageway 66.

As shown in Figure 5, these bellows 40 will begin to stretch in its upper end with thinner wall and sharper moire angles.This part (as the upper end) of bellows 40 increases gradually towards base diameter.Therefore, to each given haul distance initial and that increase gradually, when initial stretching, cause distributing the liquid of relative smaller size smaller.Therefore, the liquid of low capacity if desired, these bellows can provide good control during initial activation.Jumbo if desired liquid continues to activate these bellows and will can distribute the product of more volumes in each given haul distance, thereby increases flow.

When the Manual pressure removal, bellows 40 begin to expand because of its elasticity.Scheme can be set up the elasticity that a spring (not shown) replaces or compensate bellows 40 as an alternative.This expansion forms a negative pressure (for example being lower than atmospheric pressure) in collapsible pump chamber 40.Therefore, the liquid (being relative tack liquid at least) that atmospheric pressure promotes in the exit passageway 48 is back to bellows 40, till outlet valve member 30 is sealed on the outlet valve seat 32 again, thereby closes outlet valve 30 and 32.Certainly, monoblock type elongated passageway 66 is long more, and it is long more that valve member 30 is sealed to the time required on the valve seat, thereby the liquid that suck-back is gone in the bellows 40 is many more.This suck-back is desirable, because it can help to keep the cleaning of distributing fluids passage between two kinds of operating modes.

Referring to Fig. 6, in

case outlet valve

30 and 32 cuts out,, produce negative pressure in the bellows 40, thereby cause that 34 motions of import valve member leave import valve seat 35, thereby open inlet valve 34 and 35 along with the continuation of bellows 40 is expanded.This import valve member 34 by three spacing protruding handles 36 limit be unlikely lift off a seat 35 too far away.Therefore, the liquid that comes from container 22 sucks in the bellows 40 by inlet valve 34 and 35 through sag pipe 38.Simultaneously, air around the cup seal device of annular lip vent valve member 64 and vent valve seat 26 by and flow into the volume of containers 22 through passage 37 with the liquid of compensation amount discharge container 22.

With reference to Fig. 7, a kind of embodiment of the big capacity liquid of distribution of dispensing pump device of the present invention is provided, totally use label 120.This pump 120 is identical with aforesaid pump installation 20 basically.But lower house 126 stretches in the container 122, thereby allows bellows 140 to increase length.The protruding handle 162 of anti-abuse is connected on the lower house 126 rather than on the upper shell 124.Though the protruding handle 162 of anti-abuse does not stop pump installation 120 in the rotation of closing and opening between the shipping seal position; But when this shipping seal was in the enable possition, it can prevent the actuating of the pump installation 120 that the interference because of the nozzle around the exit passageway 148 causes.The discussion that the operation of this pump installation 120 is done with aforementioned relative pump installation 20 is substantially the same.

The diameter of bellows 140 is a constant.But bellows 140 comprise the relative thin-walled portion of its upper end and the relative thick wall part of its lower end.In addition, the moire angles of upper end has sharper angle than the moire angles of thick wall part.Therefore, the upper end of these bellows 140 will be at first flexible, and end is flexible again under these bellows 140 then.Because diameter is constant basically, because of flexible liquid volume of being distributed in whenever given haul distance remains unchanged substantially.Yet as shown in Figure 8, this bellows are equally applicable to pump installation shown in Figure 1.

Although specific embodiments of the invention are illustrated by accompanying drawing and are described by literal, under the situation of the teaching that does not break away from the present invention, can make various modifications.For example, liquid simply liquid bundle (as using in the scavenging pump) is discharged, and wherein nozzle is an open channel; Perhaps discharge with foam, wherein, (as a filter screen or static mixer) mixes air (for example passing through use venturi jet pipe) with liquid near foam forms device or its.Therefore, the present invention includes all interior embodiment of appended claims scope.

Claims

1. A retractable pump chamber for a manually actuated liquid dispensing pump assembly comprising: a corrugated annular side forming part of the interior volume of the pump chamber and having a structure adapted to expand and contract in a predetermined pattern when the pump assembly is actuated A wall characterized in that the predetermined pattern of expansion and contraction results in a volume change in a portion initially having a relatively small internal volume per given stroke length, followed by a portion of increasing internal volume per given stroke length internal volume changes.

2. The retractable pump chamber of claim 1, wherein the corrugated annular side wall has a thickness, and the variation in the thickness of the corrugated annular side wall adapts certain portions of the structure to be used when the pump device is actuated. The side walls expand and contract in a predetermined pattern.

3. The retractable pump chamber of claim 1, wherein the corrugated annular side wall has a corrugation angle, and the variation of the corrugation angle of the corrugated annular side wall makes certain parts of the structure suitable for use as the pump device Actuation causes the sidewall to expand and contract in a predetermined pattern.

4. The retractable pump chamber of claim 2, wherein the corrugated annular side wall has a corrugation angle, and the variation of the corrugation angle of the corrugated annular side wall makes certain parts of the structure suitable for use when the pump device When moving, the side wall expands and contracts in a predetermined pattern.

5. A manually actuated dispensing pump apparatus for pumping liquid from a supply container and expelling liquid through a discharge aperture, comprising the retractable pump chamber of claim 1, further comprising:

(a) a housing for sealingly mounting the dispensing pump unit to the supply container, the housing including a liquid passage portion providing fluid communication from downstream of the supply container to the discharge aperture;

(b) an inlet valve in the fluid passage that closes to prevent flow through the valve during positive downstream pressures and opens the valve during negative downstream pressures;

(c) an outlet valve within the liquid passage that opens to allow flow through the valve during positive upstream pressures and closes the valve during negative upstream pressures.

6. A manually actuated dispensing pump device as claimed in claim 5, wherein the telescoping side wall has a thickness, and the variation in the thickness of the side wall adapts certain portions of the structure to be used when the pump device is actuated. The side walls expand and contract in a predetermined pattern.

7. A manually actuated dispensing pump unit as claimed in claim 5, wherein the retractable side wall is a corrugated annular side wall forming part of the pump chamber and having a shape adapted to cause the pump unit to move when the pump unit is activated. A structure in which the side walls expand and contract in a predetermined pattern.

8. The manually actuated dispensing pump device of claim 7, wherein the corrugated annular side wall has a thickness, and the variation in thickness of the corrugated annular side wall adapts certain portions of the structure to act as the pump device Actuation causes the sidewall to expand and contract in a predetermined pattern.

9. The manually actuated dispensing pump device of claim 7, wherein the corrugated annular side wall has a corrugation angle, and the variation of the corrugation angle of the corrugated annular side wall adapts portions of the structure to The pump device expands and contracts the side wall in a predetermined pattern when actuated.

10. The manually actuated dispensing pump apparatus of claim 8, wherein the corrugated annular side wall has a corrugation angle, and the variation in the corrugation angle of the corrugated annular side wall adapts certain portions of the structure to act as the pump Actuation of the device causes the sidewall to expand and contract in a predetermined pattern.