Patent ID: 7971757

Claim:
A liquid dispenser device for being associated with a liquid reservoir (R), said device comprising: a chamber ( 10 ) provided with an inlet valve ( 5 , 15 ), an outlet valve ( 32 , 232 ), and a piston ( 3 ) that is suitable for varying the volume of the chamber, wherein the outlet valve comprises a movable valve member ( 32 ) and a valve seat ( 232 ), the valve member being secured in displacement with the piston ( 3 ); and a pusher ( 2 ) including a liquid dispenser orifice ( 25 ) and an elastically-deformable wall ( 212 ) that is displaceable relative to the liquid dispenser orifice ( 25 ), wherein said pusher is axially displaceable down and up between a rest position and a depressed position, wherein, in operation, deformation of the deformable wall ( 212 ) relative to the liquid dispenser orifice ( 25 ) displaces the piston relative to the liquid dispenser orifice, thereby opening the outlet valve.