Automatic temperature and humidity regulation – Thermostatic – With pressure control
Patent
1983-10-03
1984-06-19
Tapolcai, William E.
Automatic temperature and humidity regulation
Thermostatic
With pressure control
137491, 236 93R, G05D 2700
Patent
active
044549822
ABSTRACT:
A control valve for maintaining the temperature respectively the viscosity of pressure fluid passing therethrough substantially constant comprises a control slide provided with a throttle bore and downstream of the control slide a precontrol valve in which an end portion of an element expandable by the temperature of the pressure fluid is arranged. When pressure fluid with a certain pressure is fed through the inlet end of the control valve, the control slide is lifted from its seat and the precontrol valve opens. All of the pressure fluid entering the control valve is passed through various bores and annular gaps along the precontrol valve to the temperature expandable element. When the fluid reaches the desired maximum temperature a bypass for the fluid is created by the expandable element and a control pin actuated by the latter. Thereby the throttle action of the control valve is reduced and overheating of the pressure fluid avoided. A throttle gap between the control slide and the housing will assure removal of any air contained in the pressure fluid and a further throttle gap formed between an end face of the control slide and a disc attached thereto serves to catch any foreign particles in the pressure fluid which will be flushed away after moving of the control slide away from its seat.
REFERENCES:
patent: 3285261 (1966-11-01), Chaney
patent: 3768731 (1973-10-01), Lavado
patent: 4180208 (1979-12-01), Obermaier
patent: 4244518 (1981-01-01), Foller
patent: 4303197 (1981-12-01), Sandau
patent: 4336903 (1982-06-01), Zirps
Reick Georg
Zirps Wilhelm
Robert & Bosch GmbH
Striker Michael J.
Tapolcai William E.
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