초록 ▼

A liquid pump dispenser has a stationary spout, a fixed piston and a reciprocating cylinder therewith defining a variable volume pump chamber. The dispenser has container venting and pump priming features, and includes an inlet/discharge valve housing. The dispenser has a reduced number of parts for

A liquid pump dispenser has a stationary spout, a fixed piston and a reciprocating cylinder therewith defining a variable volume pump chamber. The dispenser has container venting and pump priming features, and includes an inlet/discharge valve housing. The dispenser has a reduced number of parts for simplicity and economy.

대표청구항 ▼

A liquid pump dispenser comprising, a pump body mountable in a fluid tight manner on a container of flowable product to be dispensed, an upstanding stationary pump piston on said body, a valve controlled inlet within said body, a manually reciprocable spring biased plunger head having a plunger skir

A liquid pump dispenser comprising, a pump body mountable in a fluid tight manner on a container of flowable product to be dispensed, an upstanding stationary pump piston on said body, a valve controlled inlet within said body, a manually reciprocable spring biased plunger head having a plunger skirt in sealing engagement with said piston for therewith defining a variable volume pump chamber, a stationary spout on said pump body defining a discharge passage extending from said pump chamber, a discharge valve acting between said pump chamber and said discharge passage, an annular sleeve on said body surrounding said piston in spaced relationship and therewith defining a vent chamber openable to the atmosphere, said body having means defining a vent passage extending from said vent chamber into the container, an annular vent seal on said plunger skirt in sealing engagement with an inner wall of said sleeve for sealing said vent chamber closed in an upper position of said plunger head relative to said piston, and means on said inner wall for breaking the sealing engagement between said vent seal and said inner wall in a lowered position of said plunger head relative to said piston for venting the interior of the container to atmosphere.