Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using disinfecting or sterilizing substance
Patent
1985-08-20
1988-06-21
Lacey, David L.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Using disinfecting or sterilizing substance
422 27, 422 28, 422 33, 422103, 422113, 422295, 251 612, 251 613, A61L 206, A61L 216, F16K 31145, F16K 31165
Patent
active
047524456
ABSTRACT:
A method for controlling air flow from an inlet to a chamber and from the chamber through the inlet to atmosphere wherein an ethylene oxide gas sterilization process is practiced in the chamber, which process includes conditions of controlled alternating vacuum and pressure. The method employs a diaphragm actuated two-way valve in the inlet line in combination with a remotely mounted three-way solenoid valve. The chamber is sealed against air flow during conditions of vacuum by spring biasing, and during conditions of pressure by spring and pressure biasing, a closure against an orifice in the two-way valve. The vacuum in the chamber is relieved at predetermined periods by selectively exerting sufficient fluid pressure against the diaphragm of the two-way valve to force the closure, which is operatively connected to the diaphragm, away from the orifice into an open position. The three-way solenoid valve selectively directs fluid to the diaphragm to exert fluid pressure against it and directs fluid to a location remote from the diaphragm to withdraw the fluid pressure exerted against the diaphragm.
REFERENCES:
patent: 2120770 (1938-06-01), Stern
patent: 2158436 (1939-05-01), Shaw
patent: 3590859 (1971-07-01), Gotzenberger
patent: 4026326 (1977-05-01), Wells et al.
patent: 4447399 (1984-05-01), Runnells et al.
patent: 4457892 (1984-07-01), Young
American Sterilizer Company
Kummert Lynn M.
Lacey David L.
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