Patent ID: 7954676

Claim:
A fluid dispenser device including a dispenser head, a pump having a piston ( 51 ) for dispensing the fluid, and an outlet valve ( 57 ), said dispenser head comprising: a body ( 1 ) defining a fluid expulsion channel ( 2 ) terminated by a dispenser orifice ( 3 ); a rigid insert ( 4 ) disposed in said expulsion channel ( 2 ); and a shutter element ( 5 ) disposed in said expulsion channel ( 2 ); wherein said shutter element ( 5 ) is displaceable between a closed position of the expulsion channel ( 2 ) and an open position of the expulsion channel ( 2 ); wherein said shutter element ( 5 ) is configured to be urged at rest towards its closed position, is automatically displaced towards its open position while the fluid is dispensed, and is returned automatically to its closed position once the fluid has been dispensed; wherein said shutter element ( 5 ) is formed integrally as a single piece with said rigid insert ( 4 ), so that said rigid insert ( 4 ) is displaceable in said expulsion channel ( 2 ) between a rest position, corresponding to the closed position of the shutter element ( 5 ), and an actuated position, corresponding to the open position of the shutter element ( 5 ); wherein said rigid insert ( 4 ) forms, or is secured to, said outlet valve ( 57 ) of said pump ( 50 ); wherein said rigid insert ( 4 ) is configured to be mechanically displaced towards the actuated position while the fluid is expelled and automatically returned to the rest position once the fluid has been expelled; wherein the pressure exerted by the fluid acts indirectly on the rigid insert to displace the rigid insert, wherein said shutter element is formed by the downstream end ( 5 ) of said rigid insert ( 4 ) in the flow direction of the fluid, wherein a hollow sleeve ( 10 ) is statically disposed in said expulsion channel ( 2 ), said downstream end ( 5 ) of said rigid insert ( 4 ) sliding, preferably in sealed manner, in said sleeve ( 10 ), and a passage for the fluid being provided between the outside wall of said sleeve ( 10 ) and the inside wall of the expulsion channel ( 2 ), and wherein, in the rest position of said rigid insert ( 4 ), the downstream end ( 5 ) of said rigid insert ( 4 ) extends beyond said fixed hollow sleeve ( 10 ) and co-operates in sealed manner with said dispenser orifice ( 3 ).