Patent ID: 7014069

Claim:
A metering pump for use in combination with a receptacle, said receptacle including an interior which contains one of a cosmetic and a pharmaceutical product, said pump comprising: a pump body, said pump body defining an interior chamber; a movable push button slidably associated with said body, said push button having a dispensing position and a non-dispensing position, said push button including an ejection orifice and a substantially cylindrical interior portion which is surrounded by an annular recess, said cylindrical interior portion including a circular sealing rib, and a locating pin; a plunger including a tubular body, said tubular body including an annular seal, said plunger operatively connected to said push button, said tubular plunger body and pump body defining a metering chamber, said plunger slidably movable relative to said pump body whereby, when said push button is moved into said dispensing position, said metering chamber communicates with said ejection orifice and said annular seal isolates said metering orifice from said receptacle interior, and, when said push button is placed in said non-dispensing position, said sealing rib abuts said tubular plunger body and isolates said metering chamber from said ejection orifice; a return spring disposed between said pump body and said push button; and a friction brake operatively disposed between said plunger and said pump body for frictionally braking relative movement between said plunger and said pump body, whereby in said non-dispensing position of said push button vacuum pressure is created in said metering chamber to enable a metered quantity of product to be drawn into said metering chamber.