Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element is a binary responsive valve
Patent
1979-02-02
1980-05-20
Richman, Barry S.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element is a binary responsive valve
422 26, 422116, 422295, A61L 500, A61L 100, A61L 300
Patent
active
042039479
ABSTRACT:
Methods and apparatus for steam sterilization in which goods are conditioned by removing air and heating to a desired temperature in sealable chamber. Pressure change in the chamber is monitored and employed to control conditioning. The goods are subjected to a plurality of controlled cyclic pressure pulses below a predetermined supra-atmospheric pressure level by alternate evacuation and vapor pressurization of the chamber. The cyclic pressure pulsing is made responsive to load characteristics which are determined by monitoring pressure change rate in the chamber. In a specific embodiment, air is flushed from the chamber initially by the injection of steam simultaneously with evacuation; the evacuation phase of each pulse continues until both a predetermined time has lapsed and a predetermined vacuum level has been attained; and, the steam pressurization phase of each pulse is continued until a fixed pressure related to sterilization temperature is reached.
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Halleck Frank E.
Young Jack H.
American Sterilizer Company
Baker Raymond N.
Richman Barry S.
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