Patent ID: 8746595

Claim:
A fluid dispenser pump comprising: a pump body; at least a first piston that slides in leaktight manner in said pump body on each actuation so as to expel a dose of fluid through a dispenser orifice that is provided in a dispenser head; a closure member, movable between a closed position and an open position, being disposed in said dispenser head upstream from said dispenser orifice, said closure member being urged towards its closed position by a resilient element, wherein said closure member in the closed position co-operates in leaktight manner with said dispenser head in at least three distinct sealing zones, each of said at least three distinct sealing zones being sealed and leak-tight in the closed position of said closure member and being unsealed in the open position of said closure member, the dose of fluid being expelled when said at least three sealing zones are unsealed, wherein a first sealing zone is formed by a central projection of the closure member that co-operates with a peripheral edge of the dispenser head, which edge defines the dispenser orifice, wherein a second sealing zone is formed by a frustoconical peripheral side edge surface at the side of the closure member, which edge co-operates with a corresponding frustoconical wall portion that is provided in said dispenser head, and wherein a third sealing zone is formed by an axially-extending side of the closure member, which side co-operates with a corresponding axially-extending wall portion that is provided in said dispenser head, said axially-extending side extending directly from said frustoconical peripheral side edge surface that forms the second sealing zone.