Chemical apparatus and process disinfecting – deodorizing – preser – Physical type apparatus – Apparatus for treating solid article or material with fluid...
Patent
1988-11-22
1991-08-13
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Physical type apparatus
Apparatus for treating solid article or material with fluid...
219 1055E, 2504551, 422288, 422305, A61L 212
Patent
active
050394959
ABSTRACT:
Method and apparatus for sterilizing articles such as dental handpieces include introducing the article and liquid sterilant solution into a collapsible pouch formed of vapor-impermeable sheet material, sealing the collapsible pouch to form a gas-tight assembly, and heating the gas-tight assembly to vaporize the liquid sterilant solution to produce an atmosphere of hot sterilant vapor. The liquid sterilant is introduced into the pouch in a quantity sufficient to create an overpressure when vaporized which is indicated by the collapsible pouch expanding to a distended condition. In one embodiment, the liquid sterilant solution is vaporized by irradiating the gas-tight assembly with microwave radiation in which case the article is sterilized under the combined effects of chemical vapor and microwave irradiation. In other embodiments particularly suited for sterilizing a plurality of articles, the at least one article is surrounded by shielding, which may be separate from or integrated with the pouch, which presents a barrier to the transmission of microwave radiation. The pouch containing the shielded article or articles and liquid sterilant is sealed and the gas-tight assembly is irradiated with microwave radiation to vaporize the sterilant whereupon the article or articles are sterilized under the effect of chemical vapor.
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Kutner Barry S.
Latowicki Daniel A.
Flexiclave, Inc.
McMahon Timothy M.
Warden Robert J.
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