Patent ID: 7172098

Claim:
A dispenser head designed to be mounted on a movable hollow actuator and delivery rod of a fluid dispenser member, said head comprising a connection sleeve ( 20 ) designed to be engaged on said movable rod, the head defining a dispenser orifice ( 31 ), a duct ( 123 ) connecting said connection sleeve ( 20 ) to the dispenser orifice, and a press surface ( 11 ) which can be pressed in order to move the head axially by pushing the hollow rod into the dispenser member, the head further comprising a shutter ( 4 ) that is housed, at least in part, in said duct ( 123 ), and that is resiliently biased by spring means ( 47 ) towards said dispenser orifice ( 31 ), said shutter ( 4 ) including a contact zone ( 41 ) that bears in resilient leaktight manner against the dispenser orifice ( 31 ) so as to seal the dispenser orifice hermetically, said shutter being axially movable against the spring means in such a manner as to withdraw the contact zone from the dispenser orifice, thereby creating an outlet passage for the fluid when sufficient pressure is exerted on the press surface, the shutter including at least one abutment zone ( 440 ) that is resiliently biased by the spring means against a fixed support zone ( 34 ), the abutraent zone thus taking up a portion of the thrust force generated by the spring means so that the contact zone bears with a constant limited force against the dispenser orifice, the dispenser head being characterized in that at least one of the dispenser orifice ( 31 ) and the contact zone ( 41 ) presents a frustoconical configuration; and wherein the shutter comprises an elongated plunger pin that extends within an elongated outlet section of the duct, the outlet section having an interior surface extending between the contact zone and the abutment zone, the interior surface opposing a facing exterior surface of the pin and spaced apart from the exterior surface of the pin.