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
  • B05B11/1001—Piston pumps
  • B05B11/1004—Piston pumps comprising a movable cylinder and a stationary piston
• • 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
• • 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
  • B05B11/1063—Air exhausted from the pump chamber being discharged into the container during priming
• • 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

Definitions

• the present invention relates to a fluid dispenser pump and a fluid dispenser device comprising such a pump.
• Fluid product dispensing pumps are well known in the state of the art, in particular for dispensing products in the fields of cosmetics, perfumery or pharmacy. They generally comprise a piston sliding in a pump body, more particularly in a pump chamber provided in this pump body, and adapted to dispense a dose of fluid product at each actuation of the pump.
• the pump chamber generally includes an inlet valve to allow the dose of product expelled on each actuation to be defined.
• certain pumps sometimes incorporate shutters at the level of the dispensing orifice, to avoid any contamination of the product between two actuations. A problem which arises with this type of pump relates to priming.
• the pump chamber is filled with air, and it is therefore necessary to expel this air entirely to allow filling of said pump chamber with fluid and allow a metering precise and reproducible each time the pump is actuated. Priming is made all the more complicated since the pump includes a shutter. It is difficult to expel the air contained in the pump chamber from the latter, in particular because of the presence of said shutter.
• Another problem that can arise with fluid dispensing pumps concerns the quality of the spray, when it is a spray pump. Indeed, particularly when there is a shutter provided at the dispensing orifice, the quality and characteristics of the spray at the time of expulsion are dependent on said shutter.
• the object of the present invention is to provide a fluid dispensing pump which does not have the abovementioned drawbacks. More particularly, the present invention aims to provide a fluid dispensing pump which allows for safe and reliable priming in a simple and inexpensive manner.
• the present invention also aims to provide a fluid dispensing pump which guarantees a spraying spray each time the pump is actuated, regardless of the force that the user exerts on it during its actuation.
• the present invention also aims to provide a fluid dispensing pump which is simple and inexpensive to manufacture and assemble.
• the present invention therefore relates to a fluid dispenser pump comprising a pump body, a pump chamber, at least a first piston sliding in said pump chamber for dispensing the fluid product, a dispensing orifice and a movable shutter.
• the pump chamber comprising an inlet valve separating the pump chamber from a dip tube s extending to a fluid reservoir, a bypass passage being provided between said dip tube and said pump chamber, said bypass passage being disposed upstream of said inlet valve, said bypass passage connecting the pump chamber to the tube plunger when priming the pump.
• the pump body is made in one piece with said shutter.
• the inlet valve comprises a valve seat integral with the first piston and a valve element, said first piston sliding in leaktight manner in said pump body, said pump body having an opening cooperating with the first piston during the priming to open said bypass passage and allow the discharge of the air contained in the pump chamber before the first actuation through the dip tube in the tank.
• said pump comprises a dispensing head incorporating said dispensing orifice.
• said shutter comprises a second piston cooperating sealingly with the head in any position, and a third piston movable relative to said head between a sealed closing position and an open position, said third piston separating the metering chamber.
• said second part of the pump chamber is connected to said bypass passage.
• said second part of the pump chamber is connected to said bypass passage by a passage provided between said second and third pistons.
• said second and third pistons are produced in a single piece.
• said second piston is produced in a single piece with said shutter.
• said shutter is urged elastically, in particular by a spring, towards its closed position and is moved and / or deformed towards its open position by the pressure of the product contained in the pump chamber.
• the shutter moves and / or deforms axially relative to said pump body, said third piston being brought into the open position from a displacement and / or a predetermined axial deformation of said shutter.
• the valve element is a ball.
• a single spring biases said first piston towards its rest position and said obturator towards its closed position.
• said spring is out of any contact with the fluid product.
• said first piston and said valve seat are produced in a single piece with a fixing element such as a snap-on, crimpable or screwable ring, suitable for fixing said pump on a fluid reservoir.
• a fixing element such as a snap-on, crimpable or screwable ring, suitable for fixing said pump on a fluid reservoir.
• the present invention also relates to a fluid dispenser device comprising a fluid reservoir and a pump as described above.
• the dispensing pump according to the present invention comprises a pump body 10 in which slides at least one first piston 72.
• This first piston 30 partly defines a pump chamber 20 and the actuation of the pump causes the dispensing a dose of product contained in the pump chamber 20 through a dispensing orifice 45, preferably formed in a dispensing head 40.
• the pump comprises a shutter 38, disposed directly upstream of the dispensing orifice 45 , and cooperating therewith by being movable and / or deformable between a position for closing the dispensing orifice 45 and an open position for the latter.
• the pump chamber comprises an inlet valve 70, which can be produced in the form of a ball 75 forming a valve element and cooperating with a valve seat 71.
• the pump body 10 is preferably formed of a monobloc piece with the shutter 38, inside thereof.
• the piston 72 and the valve seat 71 are integral with a part which incorporates a fixing ring 15 adapted to fix the pump on a reservoir 60 containing the fluid product, advantageously with the interposition of a seal 65.
• a dip tube 18, intended to extend to the bottom of the tank 60 to distribute all of the product that it contains, can also be produced in a single piece with said part forming a fixing ring 15, piston 72 and valve seat. 71.
• the valve element 75 is represented in the form of a ball, but it could be produced in a different way.
• a bypass passage 74 is provided between the dip tube 18 and the pump chamber 20, upstream of the inlet valve 70. This bypass passage 74 rehe the pump chamber 20 to the dip tube 18 during the priming of the pump. In particular, this bypass passage 74 can be produced in the form a lateral bore produced in the valve seat 71 upstream of the valve element 75.
• the valve seat 71 is then advantageously disposed upstream of the first piston 72, which slides in leaktight manner in said pump body, that -ci comprising an opening 32 adapted to cooperate with said first piston 72 during priming.
• This priming position is shown in particular in FIG. 2. It can be seen that when the user actuates the pump for the first time and that the latter contains air in the pump chamber 20, the air is compressed, which closes the inlet valve 70 by pressing the ball 75 against the valve seat 71, the air being compressible, the first piston 72 of the can slide in the pump body 10 without the shutter 38 does not move relative to the dispensing head 40.
• the pump has only one spring 50 adapted to return the first piston 72 to its rest position and the shutter 38 to its closed position after each actuation.
• This spring 50 is advantageously out of any contact with the fluid, which eliminates any risk of alteration of the fluid in question.
• the shutter 38 slides axially between its open and closed positions in a sleeve 150 provided in the bottom of the actuating head 40.
• a spray profile (not shown) is preferably produced in said sleeve for allow a swirl of the product at the time of its expulsion, to form a spray. In order to obtain a good quality spray, it is important that the shutter 38 does not move too far away from the dispensing orifice 45.
• the pump provides means for reducing this pressure in the pump chamber 20 during actuation in order to allow the shutter 38 to remain at a distance close enough to the dispensing orifice 45 to achieve a good quality spray.
• These means comprise second and third pistons 34, 35, preferably made in a single piece with said shutter 40. Said second piston 34 slides in sealed manner in the head 40, between a sealed closing position and an open position. This third piston 35 separates the pump chamber 20 into a first pump chamber part 21, disposed directly upstream of the dispensing orifice 45 and a second pump chamber part 23, located between said second piston 34 and said third piston 35.
• Said third piston 35 slides in parts 11, 13 of the head 40 which may have different diameters.
• the third piston 35 can cooperate with a head portion 11 of reduced diameter which is extended by a head portion 13 of larger diameter.
• the passage is opened between the first pump chamber part 21 and the second pump chamber part 23.
• the head part 11 may comprise one or more vent grooves for opening the passage between the two pump chamber parts 21, 23 from a predetermined position of said third piston 31.
• a passage 33 is provided between said second and third pistons 34, 35 at said second part of the pump chamber 23, said passage 33 being connected to the bypass passage 74, and consequently to the dip tube 18 and to the reservoir 60.
• the pressure in the pump chamber 20 rises very quickly, and this pressure rapidly displaces the shutter 38 by away from the dispensing orifice 45.
• the third piston 35 being integral with the shutter 38, it moves at the same time as the latter. After a predetermined axial displacement of said shutter 38, said third piston 35 reaches its open position, so that the overpressure created in the first pump chamber part 21 is transmitted to said second pump chamber part 23. This overpressure causes then a backflow of part of the dose through the passage 33 in the direction of the bypass passage 74 and therefore towards the reservoir 60 as shown by the arrows C and D in FIG. 3.
• the bypass passage 74 provided upstream of the inlet valve 70 of the pump chamber 20 therefore provides a dual function, namely of a on the one hand an air delivery passage during priming, and on the other hand a product delivery passage during certain actuations, to guarantee good spraying of the product.
• the invention has been described with reference to a particular embodiment thereof, but it is understood that various modifications could be made to it.
• the dip tube 18 is not necessarily integral or made in one piece with the fixing element 15 which fixes the pump to the reservoir 60.

Landscapes

• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Details Of Reciprocating Pumps (AREA)
• Reciprocating Pumps (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=34508327

Family Applications (1)

Country Status (7)

Families Citing this family (15)

Family Cites Families (5)

• 2003
  • 2003-11-07 FR FR0313094A patent/FR2862107B1/fr not_active Expired - Fee Related
• 2004
  • 2004-11-04 US US10/578,407 patent/US7798375B2/en not_active Expired - Fee Related
  • 2004-11-04 JP JP2006537392A patent/JP4891776B2/ja not_active Expired - Fee Related
  • 2004-11-04 DE DE602004005613T patent/DE602004005613T2/de active Active
  • 2004-11-04 CN CNB2004800322781A patent/CN100471579C/zh not_active Expired - Fee Related
  • 2004-11-04 WO PCT/FR2004/050562 patent/WO2005044465A2/fr active IP Right Grant
  • 2004-11-04 EP EP04805805A patent/EP1687097B1/de not_active Expired - Fee Related

Non-Patent Citations (1)

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