Pressure sensitive cap closure and valve

Details Pressure sensitive cap closure and valve Pressure sensitive cap closure and valve

1997-10-29

1998-12-22

Cronin, Stephen K.

Receptacles

Closures

With condition responsive vent or valve

220703, 220714, 215315, 222496, 222494, 222212, B65D 5116, B65D 2540

Patent

active

058509089

ABSTRACT:
A closure cap valve apparatus for mounting on the top of a beverage container. A piston valve within the cap is biased towards closure to prevent spillage. Additionally, pressure increase within the container is directed to increase sealing force of seals positioned on the piston and thus prevents the release of pressure from the container, allowing the closure to be used for carbonated beverages. The piston is displaced from the closed position, even when the container internal pressure is increased, by the user sucking on a mouth piece.

REFERENCES:
patent: 2207816 (1940-07-01), Packer
patent: 4785978 (1988-11-01), Kano et al.
patent: 5090600 (1992-02-01), Clark
patent: 5145083 (1992-09-01), Takahashi
patent: 5275312 (1994-01-01), Labruzzo
patent: 5366115 (1994-11-01), Kersten et al.

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