초록 ▼

A ventless miniature pump sprayer comprises a reciprocable plunger head extending outwardly of an open end of a tubular member divided into an upper sleeve section and a lower container section for a liquid to be sprayed. A dip tube integral with the member extends into the container, and a pump cyl

A ventless miniature pump sprayer comprises a reciprocable plunger head extending outwardly of an open end of a tubular member divided into an upper sleeve section and a lower container section for a liquid to be sprayed. A dip tube integral with the member extends into the container, and a pump cylinder and hollow inlet tube integral with tie member extend into the sleeve section. An integral shipper seal is molded in the inlet tube and a coaxial rod within a hollow piston on the plunger cooperates with the inlet tube for controlling the inlet and, during initial actuation of the plunger, pierces the shipper seal and has a groove or a rib thereon which establishes an air passage through which unwanted air from the pump chamber is ejected into the container to aid in pump priming.

대표청구항 ▼

A ventless fingertip pump sprayer, comprising, a container of liquid product to be dispensed, a pump cylinder supporting a dip tube extending into said container, said cylinder and said dip tube being integrally formed with said container, a plunger head having a hollow piston in sliding sealing eng

A ventless fingertip pump sprayer, comprising, a container of liquid product to be dispensed, a pump cylinder supporting a dip tube extending into said container, said cylinder and said dip tube being integrally formed with said container, a plunger head having a hollow piston in sliding sealing engagement with said cylinder for reciprocation between pressure and suction strokes, said piston and said cylinder defining a variable volume pump chamber, spring return means acting between said cylinder and said plunger head, said plunger head having a discharge passage including said hollow piston and terminating in a discharge spray means mounted on said head, an upstanding hollow tube formed integrally with said dip tube and extending into said cylinder for defining an inlet passage, a solid probe formed integrally with said head for sealingly engaging an upper inner end of said tube for valving said inlet passage closed upon initiation of each pressure stroke, a frangible shipper seal formed integrally within said hollow tube for sealing said inlet passage closed against leakage prior to initial actuation of said plunger head, said probe piercing through said shipper seal on the initial actuation of said plunger head for unsealing said inlet passage, and means on said probe for breaking said sealing engagement with said upper inner end of said tube during a continued pressure stroke upon said initial actuation to define an air passage through which unwanted air in said pump chamber is ejected under pressure into said container to assist in priming said pump chamber with the liquid product.