Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Patent
1979-11-28
1981-03-31
Garris, Bradley
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
422113, 422114, 422116, 422297, 422299, 422307, A61L 206, A61L 220, A61L 224
Patent
active
042592933
ABSTRACT:
A sterilizer utilizes fluorocarbon liquid as the sterilizing medium. The fluorocarbon liquid is retained in the bottom of a sterilizer chamber. Instruments are placed within the chamber above the liquid level. The chamber is sealed and a heater causes the liquid within the chamber to vaporize. The fluorocarbon vapor is more dense than the air within the chamber and is not miscible with that air. Consequently, as the fluorocarbon vaporizes, the air within the chamber is displaced through a vent in the top of the chamber. A minor amount of fluorocarbon vapor is also displaced as all air is purged from the chamber. The discharged fluorocarbon vapor is recondensed through an expansion valve and collected for recycling. The chamber is sealed upon purging of all the air and is maintained in a pressurized state for a period of time. Subsequently the heater is turned off and the chamber is cooled by a fan. This causes the fluorocarbon vapor to condense thereby reducing pressure within the chamber to a subatmospheric pressure. The previously discharged, condensed fluorocarbon then flows back into the chamber.
REFERENCES:
patent: 3489505 (1970-01-01), Schumann et al.
patent: 3549312 (1970-12-01), Erust
patent: 3579290 (1971-05-01), Pickstone
patent: 3834872 (1974-09-01), Joslyn
patent: 3944387 (1976-03-01), Schreckendgust
Najarian George L.
Sabri Zaker I.
American Dental Association - Health Foundation
Garris Bradley
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