Thermopneumatic actuator

Details Thermopneumatic actuator Thermopneumatic actuator

1977-10-11

1979-05-01

Wayner, William E.

Automatic temperature and humidity regulation

Motors

Fluid-operated

91365, 137 84, F15B 1316, G05D 2300

Patent

active

041519531

ABSTRACT:
A thermopneumatic actuator of the invention is used to control an automobile heater and/or air conditioner to maintain a desired temperature in the automobile passenger compartment through a mechanical output member of the actuator. The output member is connected to and moved by a diaphragm which is positioned by vacuum introduced from the automobile intake manifold and works against a diaphragm spring. A valve is controlled by a bimetal spring exposed to air from the passenger compartment to modulate the vacuum applied to the diaphragm. A feedback spring connected between the diaphragm and the valve works against the bimetal spring. An aspirator comprising a venturi tube causes air flow from the passenger compartment around the bimetal spring.

REFERENCES:
patent: 3003475 (1961-10-01), Rouvalis
patent: 3051139 (1962-08-01), Thorner
patent: 3079898 (1963-03-01), Jensen
patent: 3222995 (1965-12-01), Reed

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