Daily air removal test for sterilizers

Details Daily air removal test for sterilizers Daily air removal test for sterilizers

1997-06-25

1999-08-24

Thornton, Krisanne

Chemical apparatus and process disinfecting, deodorizing, preser

With indicating, signalling, recording, sampling, or...

422112, 422296, 73 37, 73 493, 116268, 116272, G01L 1912

Patent

active

059421932

ABSTRACT:
A device for evaluating air removal is subjected to a sterilization process whose effectiveness is dependent on a sufficiently high vacuum being achieved. A closure or lid (20, 70) seals an opening into an interior chamber (12) of a container (10). The closure and container are mechanically interconnected, e.g., fricitonally, such that a preselected pressure differential across the closure is needed to release the closure. The friction or other mechanical interconnection level and a pressure in the interior chamber are selected such that when the exterior of the container is subject to a preselected vacuum, the closure releases. Ease or reliability of reading the indication is improved with a spring (50) for expelling the closure or a frangible member (56, 72) which is severed or irreversibly deformed as the closure releases.

REFERENCES:
patent: 4289088 (1981-09-01), Scibelli
patent: 5200147 (1993-04-01), Augurt
patent: 5404746 (1995-04-01), Ocker
patent: 5659295 (1997-08-01), Renfroe et al.
patent: 5677492 (1997-10-01), Huang

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