Fluid product distributor device

Abstract

A fluid dispenser pump comprising a pump body ( 10 ), a pump chamber ( 20 ) provided with an inlet valve ( 30 ) and with an outlet valve ( 40 ), and a piston ( 50 ) sliding in said pump body ( 10 ) so as to dispense the fluid contained in the pump chamber ( 20 ), said outlet valve ( 40 ) comprising a valve element ( 41 ) co-operating with a valve seat ( 42 ), said outlet valve ( 40 ) further comprising deformable sealing means ( 45, 46 ) provided between said valve seat ( 42 ) and said valve element ( 41 ), said sealing means ( 45, 46 ) being elastically deformed in the closed position of said outlet valve ( 40 ) so as to improve sealing.

1 . A fluid dispenser pump comprising a pump body ( 10 ), a pump chamber ( 20 ) provided with an inlet valve ( 30 ) and with an outlet valve ( 40 ), and a piston ( 50 ) sliding in said pump body ( 10 ) so as to dispense the fluid contained in the pump chamber ( 20 ), said outlet valve ( 40 ) comprising a valve element ( 41 ) co-operating with a valve seat ( 42 ), the fluid dispenser pump being characterized in that said outlet valve ( 40 ) further comprises deformable sealing means ( 45 ,  46 ) provided between said valve seat ( 42 ) and said valve element ( 41 ), said sealing means ( 45 ,  46 ) being elastically deformed when said outlet valve ( 40 ) is in the closed position, so as to improve sealing.  
   
   
       2 . A pump according to  claim 1 , in which said piston ( 50 ) is secured to an actuator rod ( 5 ), said actuator rod being hollow and defining an expulsion channel ( 4 ) for the fluid, said valve seat ( 42 ) being formed in said expulsion channel ( 4 ).  
   
   
       3 . A pump according to  claim 1 , in which, while the pump is being actuated, the outlet valve ( 40 ) is urged towards its closed position by a spring ( 70 ), said valve ( 40 ) being opened by the pressure of the fluid contained in the pump chamber ( 20 ).  
   
   
       4 . A pump according to  claim 1 , in which said deformable sealing means ( 45 ,  46 ) are formed on the valve element ( 41 ).  
   
   
       5 . A pump according to  claim 1 , in which said deformable sealing means ( 45 ,  46 ) are formed on the valve seat ( 42 ).  
   
   
       6 . A pump according to  claim 4 , in which said deformable sealing means comprise at least one deformable annular lip ( 45 ).  
   
   
       7 . A pump according to  claim 6 , in which said annular lip ( 45 ) is flexible and co-operates with a frustoconical surface when the valve ( 40 ) is in the closed position.  
   
   
       8 . A pump according to  claim 6 , in which said annular lip ( 45 ) is made by overmolding.  
   
   
       9 . A pump according to  claim 1 , in which the valve seat ( 42 ) includes a flexible annular lip ( 45 ) co-operating with a frustoconical valve element ( 41 ), said valve element ( 41 ) being substantially rigid.  
   
   
       10 . A pump according to  claim 9 , in which the valve seat ( 42 ) is made out of two materials, said annular lip ( 45 ) being made out of a material that is softer than the remainder of the valve seat ( 42 ).  
   
   
       11 . A pump according to  claim 4 , in which said deformable sealing means comprise a deformable O-ring ( 46 ).  
   
   
       12 . A pump according to  claim 11 , in which said O-ring ( 46 ) co-operates with a frustoconical surface when the valve ( 40 ) is in the closed position.  
   
   
       13 . A pump according to  claim 11 , in which said O-ring ( 46 ) is secured by interfitting, snap-fastening, or overmolding.  
   
   
       14 . A pump according to  claim 1 , in which the valve element ( 41 ) is substantially rigid and includes a deformable O-ring ( 46 ) co-operating with a frustoconical valve seat ( 42 ), said valve seat ( 42 ) being substantially rigid.  
   
   
       15 . A fluid dispenser device, characterized in that it includes a pump according to  claim 1.