Closure cap construction with slitted flexible diaphragm

Details Closure cap construction with slitted flexible diaphragm Closure cap construction with slitted flexible diaphragm

1991-02-15

1991-12-10

Marcus, Stephen

Bottles and jars

Closures

With pressure-responsive valve

215114, 215247, 220203, 220209, 220229, 220257, 220 891, 222490, 222491, 222494, B65D 5116, B65D 5120, B65D 2500, B65D 572

Patent

active

050710176

ABSTRACT:
A valving-type closure having a resilient diaphragm provided with a portion having a through slit for the passage of fluids, the slit portion being adapted to bulge and open the slit in response to fluid pressure applied to one side thereof. The slit portion has abuttable, cooperable structures on one side, which come into forcible abutment and act to physically open the slit as the portion bulges. Preferably the abuttable structures are in the form of rings molded on the underside of the diaphragm. The slit through the diaphragm also extends through the ring, thereby forming two semi-circular ring segments. The ring segments in turn form abutment shoulders that pivot the walls of the slit away from one another when the diaphragm is bulged, thereby resulting in a more pronounced spreading force being applied to the walls, and increasing the size of the opening formed by the slit.

REFERENCES:
patent: 1865764 (1932-07-01), Keenan
patent: 2070377 (1937-02-01), Simmons
patent: 2550132 (1951-04-01), Woods
patent: 2552715 (1951-05-01), Gray et al.
patent: 2667992 (1954-02-01), Hammond et al.
patent: 2670884 (1954-03-01), Swartz
patent: 3273754 (1966-09-01), Lindley
patent: 3608793 (1971-09-01), Van LobenSels
patent: 4133457 (1979-01-01), Klassen
patent: 4981229 (1991-01-01), Lanham

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