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
  • B05B11/1016—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element
  • B05B11/1018—Piston pumps the outlet valve having a valve seat located downstream a movable valve element controlled by a pressure actuated controlling element and the controlling element cooperating with means for opening or closing the inlet valve
• • 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
  • B05B11/1038—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber
  • B05B11/104—Pressure accumulation pumps, i.e. pumps comprising a pressure accumulation chamber the outlet valve being opened by pressure after a defined accumulation stroke

Definitions

• the present invention relates to a fluid dispenser pump with manual actuation, as well as a fluid dispenser device comprising such a pump.
• a fluid dispensing pump generally comprises a pump body in which a piston slides between a rest position and a dispensing position.
• the pump body may contain a pump chamber generally defined between an inlet valve and an outlet valve.
• sealing at the outlet valve is essential during actuation to avoid leakage before the actuation ends, and, similarly, sealing at the inlet valve must also be optimal in order to avoid any backflow of the product contained in the pump chamber towards the reservoir at the time of actuation.
• priming that is to say the evacuation of the air contained in the pump chamber before the first actuation of the pump.
• the object of the present invention is therefore to provide a pump for dispensing a fluid product which ensures a perfect seal at the outlet valve and the inlet valve during actuation of the pump, eliminating any risk of leakage or backflow of the product contained inside the pump chamber during actuation, and thus guaranteeing the accuracy and reproducibility of the dosage.
• the present invention also aims to provide a fluid dispensing pump which provides simple priming of this pump, even when the device incorporating the pump comprises a shutter.
• the present invention also aims to provide such a fluid dispensing pump which is simple and inexpensive to manufacture and assemble.
• the present invention therefore relates to a fluid dispensing pump with manual actuation, comprising a pump body containing a pump chamber, said pump chamber being defined between an inlet valve and an outlet valve, a sliding piston in said pump body between a rest position and a dispensing position, for dispensing the product contained in the pump chamber, said piston being connected, in particular in one piece, to an actuating rod comprising an expulsion channel, said inlet valve comprising an inlet valve element displaceable in the pump body and cooperating with said pump body or an element integral with said pump body to define the open and closed positions of said inlet valve, said outlet valve comprising an outlet valve element movable in the pump body and cooperating with said actuating rod, or an element integral with the said actuating rod for defining the open and closed positions of said outlet valve, characterized in that, upon actuation, said outlet valve is biased towards its closed position by the pressure of the product contained in the pump chamber, said outlet valve member being moved to the open position of the outlet valve by said inlet valve member when the
• said inlet valve member comprises a lower hollow axial sleeve which, in the closed position of said inlet valve, slides sealingly around a hollow axial tube integral with the pump body, lower end of said lower sleeve being spaced from the upper end of said axial tube in the open position of said inlet valve, to define a passage for product towards the pump.
• said axial tube of the pump body comprises one or more radial projection (s) cooperating with the lower end of said lower sleeve of the inlet valve element during the first actuation, to open an expulsion passage for the air contained in the pump chamber, to prime the pump.
• said inlet valve member comprises an upper hollow axial sleeve whose upper edge forms a radial shoulder towards the inside and which is slidably mounted around said outlet valve member, between two radial shoulders towards the outside and upper of said outlet valve member.
• said upper edge of the upper sleeve cooperates with said lower shoulder of the outlet valve member to open said outlet valve, when the piston reaches its dispensing position.
• said upper edge of the upper sleeve cooperates with said upper shoulder of the outlet valve element to close said outlet valve, after expulsion of the product contained in the pump chamber.
• a spring is disposed between the pump body and the inlet valve element, said spring urging said inlet valve towards its open position and the piston towards its rest position.
• the present invention also relates to a fluid dispenser device comprising a pump as defined above.
• FIG. 1 is a schematic cross-sectional view of a pump according to a first embodiment of the present invention, in the rest position;
• Figure 2 is a view similar to that of Figure 1, in the priming position;
• Figure 3 is a figure similar to those of Figures 1 and 2, in the dispensing position;
• FIG. 4 is a schematic cross-sectional view of a second embodiment of the present invention, in the rest position
• Figure 5 is a view similar to that of Figure 4, in the priming position.
• the pump according to the present invention comprises a pump body 10 in which a piston 50 slides between a rest position (shown in Figures 1 and 4) and a dispensing position (shown in Figures 3 and 6 ).
• the piston 50 is connected, preferably in a single piece, to an actuating rod 60 on which the user exerts an axial force, for example by means of a pusher or a dispensing head (not shown) ).
• the actuating rod 60 may be hollow and generally comprises an expulsion channel 65 allowing the expulsion of the product.
• the pump body 10 contains a pump chamber 20 defined between an inlet valve 30 and an outlet valve 40.
• the inlet valve 30 comprises an inlet valve element 31 which cooperates with the pump body 10 or an element integral with the latter to define the open and closed positions of said inlet valve 30.
• the outlet valve 40 comprises an outlet valve element 41 which cooperates with the actuating rod 60 (or an element integral with the latter) to define the open and closed positions of said outlet valve 40.
• the inlet valve member 31 and the outlet valve member 41 are both movable at inside the pump body 10.
• the pump of the invention can be mounted on a reservoir (not shown) by means of a fixing ring 1 which can be any, and in particular screwable, crimpable or snap-on.
• a seal 5 is interposed between the upper edge of the reservoir (not shown) and the fixing ring 1.
• a dispensing head or pusher is then assembled on the pump to actuate the latter, and thus form a dispensing device. of fluid with manual actuation.
• the outlet valve 40 is biased towards its closed position by the pressure of the product contained in the pump chamber 20. This guarantees that there is no risk of leakage during actuation of the pump. , since as soon as the user actuates the pump, it creates a pressure inside the pump chamber 20 and this pressure will urge the outlet valve 40 to its closed position and therefore ensure optimum sealing at this level.
• the inlet valve member 31 cooperates with a part of the pump body 10 which is produced in such a way that the pressure of the product contained inside the pump chamber 20 also improves the tightness of said inlet valve 30.
• the inlet valve member 31 cooperates with the outlet valve member 41 to move the latter mechanically to the open position of the outlet valve 40. This mechanical opening of the outlet valve at the end of the pump actuation stroke ensures distribution of the entire dose on each actuation of the pump.
• the inlet valve element 31 comprises a lower hollow axial sleeve 32 and an upper hollow axial sleeve 34.
• the lower axial sleeve 32 slides in leaktight manner around a hollow axial tube 12 secured to the pump body 10.
• this axial tube 12 can be produced in a single piece with the pump body 10 and be concentric inside thereof, at its lower edge.
• the seal is produced at the lower end 33 of said lower sleeve 32, and this seal is therefore improved during actuation of the pump by the pressure of the product contained in the pump chamber 20, the product extending around said lower sleeve 32 of the inlet valve member 31.
• lower end 33 of said lower sleeve 32 is spaced from the end upper 13 of said axial tube 12, which defines the opening position of the inlet valve 30, by opening a passage for the product towards the pump chamber 20.
• said axial tube 12 of the pump body 10 may comprise one or more radial projection (s) 14, preferably produced in its lower part, and which cooperate) with the lower end 33 of said lower sleeve. 32 of the inlet valve member 31 during the first actuation of the pump.
• This allows the pump to be primed in a safe and simple manner by evacuating the air contained in the pump chamber 20 through the dip tube towards the interior of the reservoir (not shown).
• Figures 2 and 4 show the priming position, in which the lower end 33 of the lower sleeve 32 cooperates with said radial projections 14 of the axial tube 12. This opens an expulsion passage for the air contained in the chamber pump 20.
• the pump chamber 20 is filled with fluid from the reservoir (not shown).
• the fluid product not being compressible unlike air
• the inlet valve element 31 will never reach the position in which its lower end 33 can cooperate with said radial projections 14 of the axial tube 12.
• the outlet valve 40 of the pump will always be mechanically opened by said inlet valve member 31 before said lower edge 33 of said inlet valve member 31 reaches said radial projections 14
• the presence of these radial projections 14 therefore makes it possible to prime the pump, but does not present any risk of leakage during the subsequent actuation of the pump, in particular at the level of the sealing of the inlet valve 30.
• the present invention therefore provides a simple and reliable priming, and the evacuation of air through the dip tube allows the pump of the present invention to be used with any type of shutter, including a shutter which does not allow the expulsion of air during priming.
• the upper hollow axial sleeve 34 of the inlet valve member 31 has an upper edge 35 which forms an inward radial shoulder. This upper edge 35 is slidably mounted, preferably in a sealed manner, around a part of said outlet valve element 41, defined between two radial outward and upper outward shoulders 45 and 46.
• the upper edge 35 of the upper sleeve 34 cooperates with said lower shoulder 45 of the outlet valve member 41 to mechanically open said outlet valve 40 when the piston 50 reaches its dispensing position.
• the outlet valve is automatically returned to its closed position after actuation of the pump by the product entering inside the pump chamber 20 when the piston 50 returns from its dispensing position to its rest position.
• the embodiment of Figures 4 to 6 provides that the upper edge 35 of the upper sleeve 34 of the inlet valve member 31 cooperates with said upper shoulder 46 of the outlet valve member 41 to close mechanically said outlet valve 40 after expulsion of the product contained in the pump chamber 20.
• this characteristic of mechanically closing the outlet valve 40 could quite be adapted in the first embodiment described with reference to Figures 1 to 3 .
• a spring 70 forming the return spring of the pump, is advantageously disposed between the pump body 10 and the inlet valve element 31. This spring 70 biases the inlet valve 30 towards its open position and the piston 50 to its rest position.
• the present invention therefore provides a safe and reliable pump which avoids any risk of leakage during actuation, which allows a safe and reliable priming during of the first actuation of the pump, and which above all is simple and inexpensive to manufacture and assemble, since it comprises only a very small number of component parts.
• the present invention uses only six parts, namely the pump body 10, the inlet valve element 31, the outlet valve element 14, the return spring 70, the piston 50 and a ferrule 80 (which is the stop element fitted in the upper edge of the pump body 10 and which defines the rest position of the piston 50).

Landscapes

• Reciprocating Pumps (AREA)
• Details Of Reciprocating Pumps (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=28686139

Family Applications (1)

Country Status (7)

Families Citing this family (4)

Family Cites Families (3)

• 2002
  • 2002-04-17 FR FR0204814A patent/FR2838787B1/fr not_active Expired - Lifetime
• 2003
  • 2003-04-10 EP EP03740589A patent/EP1497037B1/de not_active Expired - Lifetime
  • 2003-04-10 DE DE60302056T patent/DE60302056T2/de not_active Expired - Lifetime
  • 2003-04-10 WO PCT/FR2003/001144 patent/WO2003086648A1/fr active IP Right Grant
  • 2003-04-10 AU AU2003262151A patent/AU2003262151A1/en not_active Abandoned
  • 2003-04-10 JP JP2003583647A patent/JP4369760B2/ja not_active Expired - Fee Related
  • 2003-04-10 CN CNB03811335XA patent/CN1329126C/zh not_active Expired - Fee Related

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events