Centrifugally loaded self-sealing integral one-piece cap/closure

Details Centrifugally loaded self-sealing integral one-piece cap/closure Centrifugally loaded self-sealing integral one-piece cap/closure

1998-03-20

2000-05-16

Warden, Sr., Robert J.

Bottles and jars

Closures

With pressure-responsive seal

215271, 422 72, 422 99, 422102, B65D 5300

Patent

active

060624078

ABSTRACT:
A capping and sealing assembly for a sample-holding centrifuge container which features a self-sealing lid that forms a fluid-tight seal in an opening of the canister with a predetermined amount of force, with the force being dependent upon the centrifugal load to which the capping assembly is subjected. The lid includes a cover portion and a peripheral member surrounding the cover portion and extending transverse thereto. The lid is disposed within an open end of the container, with the peripheral member having a frusto-conical surface that faces the container's wall. A gasket is disposed about the frusto-conical surface, forming a fluid-tight and air-tight seal with the cylindrical wall of the canister. The gasket is received in a channel formed into the frusto-conical surface. A region of the channel includes a vent slot to facilitate removal of the container from the canister. A plurality of arcuate ribs extend across the cover portion, between opposed areas of the peripheral member. Each of the ribs are adapted to flex, under centrifugal force, expanding the opposed areas outwardly. In this manner, the sealing force between the peripheral member and the wall is increased.

REFERENCES:
patent: 558523 (1896-04-01), Rosedale
patent: 4007848 (1977-02-01), Snyder
patent: 4065018 (1977-12-01), Megowen et al.
patent: 4738370 (1988-04-01), Urmston et al.
patent: 4747502 (1988-05-01), Luenser
patent: 5325977 (1994-07-01), Haynes et al.
patent: 5855289 (1999-01-01), Moore
patent: 5899349 (1999-05-01), Moore

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