Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1061—Pump priming means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1001—Piston pumps
  • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1073—Springs
  • B05B11/1074—Springs located outside pump chambers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1066—Pump inlet valves
  • B05B11/1067—Pump inlet valves actuated by pressure

Definitions

• the present invention relates to a fluid dispenser pump generally intended to be associated with a fluid reservoir to form together a fluid dispenser. It is a dispensing member whose actuation is usually performed manually using a finger of the user.
• the fluid product is distributed in the form of a jet of fine sprayed droplets, a continuous net or a dab of fluid, particularly in the case of viscous product, such as cosmetic creams.
• a fluid dispenser member may in particular be used in the fields of perfumery, cosmetics or even pharmacy to dispense more or less viscous products.
• the present invention is more particularly, but not exclusively, concerned with a type of pump which is commonly referred to as a "push pump".
• a type of pump which is commonly referred to as a "push pump”.
• the dispensing member comprises a pusher forming not only a dispensing orifice but also defining a portion of a fluid product chamber in which fluid is selectively pressurized.
• an inner surface of the pusher of generally cylindrical general shape, serves as a sealing slider for an outlet valve piston which moves in sealing contact in this barrel to thereby selectively unmask the dispensing orifice.
• These pistons are generally of the differential type, moving in response to a pressure variation of the fluid product inside the chamber.
• valve piston in such a pusher pump, there is a valve piston and a main piston, movable in sealing contact in respective drums.
• the two pistons may be made in one piece and the assembly may be referred to simply as a "piston" comprising a main piston lip and an outlet valve lip.
• the inlet valve of the chamber is formed by a ball, a valve with deformable flap or by the differential piston itself.
• the problem encountered in this type of pump is the priming of the pump, that is to say the first filling of the chamber with fluid from the reservoir.
• the aforementioned prior art documents do not deal with this problem. Unlike conventional dispensers in which the pump allows to reject the air initially contained in the chamber inside the tank, this is very often not possible with push pumps, because they are mounted on tanks of very small capacity . Therefore, it is not possible to reject the air initially contained in the chamber to the tank, because the tank is completely filled with fluid. The release of air into a small capacity tank could cause pump malfunctions due to the pressurization of the fluid stored in the tank.
• the present invention aims to prime a fluid dispenser device in a simple manner, without additional step, and at a lower cost.
• the solution of rejecting air into the tank is excluded.
• the present invention proposes a fluid dispenser device intended to be associated with a fluid reservoir, said device comprising a fluid dispenser orifice, an axially displaceable pusher back and forth between a rest position and a depressed position, a chamber provided with an inlet valve, a flap valve outlet and a piston adapted to vary the volume of the chamber, the outlet valve comprising a movable valve member and a valve seat, the movable member being integral in displacement of the piston, the piston comprising an elastically deformable portion which is deformed by the pusher in the depressed position so as to open the outlet valve, the pusher forming the outlet valve seat, characterized in that it further comprises a body intended to be mounted on an opening of a reservoir , the body forming a piston sliding shaft defining a free upper edge, the piston comprising a piston lip in sealing sliding contact in the piston rod and an annular flange extending outwardly above the upper edge the barrel, the movable valve member being formed on the outer periphery of the
• the outlet valve is thus formed between the piston and the pusher, and in normal operation, the piston moves in the pusher in response to an increase in pressure of the fluid in the chamber.
• the piston does not move in the pusher, because it only compresses air.
• the pressure in the chamber does not reach the threshold necessary to move the piston in the pusher.
• the actuation of the pusher has the effect of compressing the air stored in the chamber before its first filling with fluid.
• the outlet valve can not open because the piston does not move in the pusher.
• the piston is a differential piston able to move with the variations of pressure of the fluid product in the chamber, the piston being momentarily out of contact with the pusher.
• the piston is in contact with the pusher when the pressure in the chamber is below a predetermined threshold by a return spring which urges the piston towards the pusher.
• the pusher forms part of the chamber.
• the present invention can be applied to other forms of pump or more generally dispensing devices in which the piston cooperates with the pusher to form an outlet valve.
• the outlet valve is thus formed between the piston and the pusher, and in normal operation, the piston moves in the pusher in response to an increase in pressure of the fluid in the chamber.
• the piston does not move in the pusher, because it only compresses air.
• the pressure in the chamber does not reach the threshold necessary to move the piston in the pusher.
• the actuation of the pusher has the effect of compressing the air stored in the chamber before its first filling with fluid.
• the outlet valve can not open because the piston does not move in the pusher. Thanks to the present invention, it is possible to deform the piston with the pusher.
• the pusher comprises an upper plate on which a user can exert a pressure with the aid of a finger and a peripheral skirt forming the dispensing orifice, the plate forming the outlet valve seat and a support ring. intended to bear on the flange to deform, the ring being located radially outside the upper edge of the barrel.
• the flange which is advantageously of annular shape therefore abuts at its inner periphery on the upper edge of the barrel and is pressed downwards at its outer periphery by the pusher which advantageously forms a support ring.
• the flange is therefore forced to bend very slightly, but this is sufficient to take off the movable outlet valve member of its seat and thus create a leakage passage for air under pressure in the chamber.
• the piston comprises a flexible membrane and an anchoring collar engaged with the pusher, the membrane connecting the movable valve member. to the collar by defining an outlet channel for the fluid product to the dispensing orifice. It can indeed be envisaged to implement such a piston (having a piston lip, a movable outlet valve member, a flexible membrane and an anchor collar engaged with the pusher) without deformable flange.
• the deformable part has a resistance to deformation which is greater than the force exerted by the spring and greater than or equal to the maximum pressure prevailing in the chamber.
• a principle of the invention is to locally deform the piston to constrain the outlet valve to open. It is thus possible to let the pressurized air escape into the chamber and to initiate the device.
• the deformation of the piston normally no longer occurs. And even in case of deformation, it will have no consequences on the distribution of the product. This is explained by the fact that the forced opening of the outlet valve by deformation of the piston takes place in the depressed position exerting a force greater than the normal operating force of the device. Even if the user comes to press very strongly on the pusher, the piston would deform but as the pump chamber is empty, there is more distribution.
• FIG. 1 is a vertical cross-sectional view through a dispensing device according to one embodiment of the invention in the rest position
• FIG. 2 is a view similar to that of FIG. depressed
• FIG. 3 is a very greatly enlarged view of the detail A of FIG.
• the dispensing device of the figures is a pump which is shown associated with a container R comprising a neck C on which the dispensing device of the invention is fixed.
• the pump comprises five components, namely a body 1, a pusher 2, a piston 3, a spring 4 and a movable member 5 of the inlet valve.
• the pump may further comprise a plunger tube 6.
• the body, the plunger, the piston, the movable member 5 and the plunger tube 6 are preferably made by molding plastics material.
• the pump comprises a pump chamber 10.
• the body 1 comprises a fixing ring 11 which cooperates with the neck C for fixing the pump on the container R.
• the ring 11 is engaged with the outside of the neck.
• the body forms a self-sealing lip 12 in sealing engagement with the inner wall of the neck.
• the body 1 also forms a guide sleeve 14.
• the body also forms a main piston shaft 17 which internally defines a sealed sliding surface, whose function will be given below.
• the drum 17 defines a free upper edge 171 which will serve as a stop for the piston, as will be seen below.
• the body also forms an inlet sleeve 16 which forms an inlet valve seat 15.
• the inlet sleeve 16 extends concentrically below the barrel 17.
• the body 1 has an axial symmetry of revolution about an axis X which extends longitudinally at the axial center of the inlet duct 18.
• This is a particular design for a particular body of a device dispenser according to one embodiment of the invention. Good understood, the body may have other characteristics than those just described, without departing from the scope of the invention.
• the pusher 2 forms a dispensing head for the pump.
• the pusher 2 comprises a support plate 21 and a peripheral skirt 22 which extends downwards from the outer periphery of the support plate.
• the pusher 2 has a general shape of inverted bucket whose support plate forms the bottom and the skirt the cylindrical side wall.
• the skirt is not necessarily cylindrical. It may have frustoconical or rounded sections.
• the support plate 21 comprises a bearing zone 211 on which one can press with one or more finger (s).
• the plate 21 forms at its lower wall a bearing ring 26 and an annular seat 27 for the outlet valve.
• the seat is here formed by an external reinforcement of the crown.
• the skirt 22 comprises an upper distribution wall 23 and a lower guide wall 24.
• the distribution wall 23 is connected at its upper end to the outer periphery of the support plate 21.
• the distribution wall 23 is formed with an orifice dispensing nozzle 25 extending from the inner surface to the outer surface.
• the dispensing orifice 25 may open at the outer surface in a diffusion cup 251.
• the guide wall 24 comprises a stopper bead 241 on its inner surface intended to cooperate with the guide bushing 14.
• the stopper bead 241 makes it possible to secure the pusher to the body, which can thus only move axially on a determined maximum stroke.
• the piston 3 comprises a lip 36 engaged in leaktight sliding in the barrel 17, an axial rod 35 traversed by a connecting channel 37, a radial annular flange 31 which extends towards the outside from the rod above the edge 171 of the barrel 17, a movable member 32 for the outlet valve, a flexible membrane 33 and an anchoring collar 34. More specifically, the lip 36 is formed at the lower end of the axial rod 35.
• the connecting channel 37 passes through the rod 35 substantially axially.
• the flange 31 is connected to the upper end of the rod 35.
• the diameter of the rod 35 is slightly smaller than the internal diameter of the barrel 17.
• the inner edge of the flange 31 is located just above the edge 171 of the barrel 17.
• the movable member 32 for the outlet valve is formed at the outer periphery of the flange 31.
• the movable member may be in the form of an annular rib adapted to come into selective sealing contact with the seat 27 formed by the plate 21 of the pusher 2.
• the return spring 4 pushes the flange 31 to the plate 21, so that the rib 32 is pressed against the seat 27.
• the outlet valve is closed.
• the return spring 4 is supported on the one hand on the body 1 and on the other hand under the flange 31.
• the spring 4 is disposed around the barrel 17.
• the anchor collar 34 engages sealingly tight against the wall of 23 distribution of the skirt 22 of the pusher 2.
• the anchoring collar 34 is thus integral with the pusher 2.
• the anchoring collar 34 is annular and is located below the dispensing orifice 25.
• the flexible membrane 33 connects the anchoring collar 34 to the flange 31.
• an outlet channel 28 is formed between the pusher and the diaphragm 33. This channel communicates the outlet valve 32, 27 with the dispensing orifice 25.
• the outlet channel 28 has an annular configuration.
• an outlet valve lip can be provided which slides in a sealed manner in the pusher.
• part of the piston 3 is made to be elastically deformable.
• the elastically deformable portion is formed by the flange 31 connecting the rod 35 to the movable member 32 of the valve member. exit. This flange 31 is caused to deform, and more particularly to bend, when the pusher 2 presses on the flange 31 while it is in abutment on the upper free edge 171 of the drum 17, as can be seen in the figures 2 or 3.
• the support ring 26 which presses on the upper wall of the flange 31 while its lower wall abuts on the edge 171. It may be noted that the ring 26 is located radially more outside than the edge 171, so that the flange 31 will deform by bending down at its outer periphery. Gold, it is precisely on its outer periphery that is formed the rib serving as movable member 32 of the outlet valve. Therefore, the bending of the flange 31 by pressing the ring 26 will cause a slight opening of the outlet valve by detachment of the rib 32 of its seat 27, as can be seen in Figure 3. The deflection of the flange 31 is not noticeable in Figure 2: indeed, it is not necessary that the outlet valve is largely open. On the contrary, a small gap imperceptible to the naked eye is sufficient to allow the air under pressure in the chamber to escape into the outlet channel 28 to gain the orifice 25. This imperceptible gap has been designated on the Figure 3 by the letter I.
• the body 1, the pusher 2 and the piston 3 together form a pump chamber 10 which extends continuously in the main drum 17, through the connecting channel 37, between the plate 21 and the flange 31.
• the spring 4 pushes the piston 3 in abutment against the pusher. More specifically, the spring pushes the valve member 32 against the seat
• the ring 26 of the plate 21 comes into light contact with the flange without disturbing the sealing contact of the outlet valve.
• the crown may even be slightly peeled off the flange.
• the inlet flap is closed.
• the pusher By exerting a force on the bearing zone 211, the pusher moves axially relative to the body 1 by driving the piston. At first, the movement of the pusher has the effect of pressing the inlet valve. Thus, the pump chamber 10 is isolated from the reservoir R. From this moment, the product in the pump chamber 10 will be pressurized. Since the fluid product is incompressible, the total useful volume of the pump chamber must remain constant. But as the main piston 36 sinks into the drum 17 thus decreasing the volume of the lower part of the chamber, a new volume must be created. This is possible because the differential piston moves away from the support plate 21. This has the effect of detaching the movable member from its seat and thus to open the outlet valve.
• the fluid under pressure in the pump chamber thus finds an outlet passage to the dispensing orifice.
• the passage remains open as long as the pressure to the interior of the chamber can overcome the force of the spring 4.
• the depressed position is reached when the flange 31 abuts on the edge 171 of the barrel.
• the chamber 10 is then at its minimum volume.
• Such an outlet valve piston and flexible membrane is a characteristic that can be protected in itself, that is to say independently of the fact that the flange is deformable to achieve priming. This corresponds to a normal cycle of operation of the pump once it has been primed, that is to say with its chamber filled with fluid.
• the flange 31 has a resistance to deformation which is greater than the force exerted by the spring 4 and greater than or equal to the maximum pressure prevailing inside the chamber 10.
• the flange does not deform under normal operating conditions of the pump. In other words, once the pump is primed, the user is not normally required to deform the flange when he presses the pusher to dispense the fluid. Simply make the flange with a sufficient wall thickness.
• the deformable flange of the piston it is possible to open the outlet valve and create a leakage passage for the air initially trapped in the pump chamber.
• the flange here forms the deformable part.
• the abutment for the flange is here formed by the upper edge 171 of the barrel 17.
• another part of the device such as the body or the spring, can be used to make this abutment for the flange or another deformable part of the piston. Priming of the dispensing device can be done by the user or in the factory. Priming can serve as an indication of first use.
• the flange here has a flat disc shape. It can present other forms: frustoconical, stepped, etc.

Landscapes

• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Closures For Containers (AREA)
• Reciprocating Pumps (AREA)
• Devices For Dispensing Beverages (AREA)
• Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38006945

Family Applications (1)

Country Status (9)

Families Citing this family (5)

Family Cites Families (12)

• 2006
  • 2006-09-27 FR FR0653967A patent/FR2906233B1/fr not_active Expired - Fee Related
• 2007
  • 2007-09-20 CN CN2007800411308A patent/CN101534958B/zh not_active Expired - Fee Related
  • 2007-09-20 AT AT07848349T patent/ATE474671T1/de not_active IP Right Cessation
  • 2007-09-20 WO PCT/FR2007/051977 patent/WO2008037910A1/fr not_active Ceased
  • 2007-09-20 DE DE602007007971T patent/DE602007007971D1/de active Active
  • 2007-09-20 BR BRPI0717543-4A patent/BRPI0717543A2/pt not_active IP Right Cessation
  • 2007-09-20 EP EP07848349A patent/EP2069077B1/de active Active
  • 2007-09-20 ES ES07848349T patent/ES2348798T3/es active Active
  • 2007-09-27 US US11/905,019 patent/US7770759B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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