Container closure provided with air pump mechanism

Details Container closure provided with air pump mechanism Container closure provided with air pump mechanism

1988-01-22

1989-07-18

Shaver, Kevin P.

Dispensing

With discharge assistant

Fluid pressure

222464, 4623, B65D 8300

Patent

active

048485993

ABSTRACT:
A closure to be applied to a container for holding a liquid such as shampoo. The closure comprises a closure body, a discharge liquid tube extending through the closure body and a reciprocating air pump mechanism built in the closure body. The air pump mechanism includes a cylinder whose discharge side communicates with the inside of the container and whose intake side communicates externally of the container, a piston, and a spring for elastically biasing the piston toward the intake side. The piston has a rod whose free end portion extends outwardly of the closure body.

REFERENCES:
patent: 2069383 (1937-02-01), Nedbalek
patent: 3032081 (1962-05-01), Cotta

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