Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Sensed condition is operating time and control is operation...
Patent
1987-05-15
1989-09-12
Marcus, Michael S.
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Sensed condition is operating time and control is operation...
36447416, 36455101, 364557, 364558, 422 26, 422108, 422109, G05B 1900
Patent
active
048658146
ABSTRACT:
A microprocessor controls a heater which generates steam inside the sealed chamber of a sterilizer. During that portion of the sterilizer cycle wherein sterilizing conditions are trying to be attained, the microprocessor monitors both the temperature and pressure levels inside the chamber by controlling the heater and waits until both variables reach predetermined levels before starting a sterilize timer. Once the timer is started, it is stopped if the level of either one of the temperature or pressure variables drops below a predetermined minimum value which, in the preferred embodiment, air their optimum values. While the sterilize timer is timing, the pressure level rather than the temperature level is used by the microprocessor to control the heater. These features allow a more reliable and accurate control of the generation and maintenance of sterilizing conditions inside the chamber, resulting in greater assurance of complete sterilization while minimizing the expenditure of time and energy.
REFERENCES:
patent: 4003703 (1977-01-01), Montgomery, Jr. et al.
patent: 4261950 (1981-04-01), Bainbridge et al.
patent: 4309381 (1982-01-01), Chamberlain et al.
patent: 4372916 (1983-02-01), Chamberlain et al.
patent: 4447399 (1984-05-01), Runnells et al.
patent: 4710350 (1987-12-01), Petersen
Edelman Lawrence C.
Marcus Michael S.
Pelton & Crane
Santiago Amalia L.
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