Pneumatic control means for a vehicle heat exchanger system or t

Details Pneumatic control means for a vehicle heat exchanger system or t Pneumatic control means for a vehicle heat exchanger system or t

1979-05-29

1981-03-03

Tapolcai, Jr., William E.

Automatic temperature and humidity regulation

Motors

Fluid-operated

137 85, 236 49, G05D 2308

Patent

active

042536049

ABSTRACT:
A thermostat construction having a valve unit for directing a pneumatic signal to a pneumatically operated control device in relation to the force differential between the temperature sensed by the temperature sensing unit thereof and the temperature setting of a temperature setting unit thereof, a lever being pivotally mounted to the construction and being operatively interconnected to the valve unit at a first portion of the lever and to the temperature setting unit and the temperature sensing unit at a second portion of the lever. A pneumatically operated positioning construction having a valve unit for directing a pneumatic signal to a positioning chamber thereof in relation to the force differential between a pneumatically operated setting unit thereof and a feedback unit of the positioning chamber, a lever being pivotally mounted to the construction and being operatively interconnected to the valve unit at a first portion of the lever and to the setting unit and the feedback unit at a second portion of the lever.

REFERENCES:
patent: 2529875 (1950-11-01), Howard
patent: 3212710 (1965-10-01), Nilles
patent: 3263925 (1966-08-01), Joesting
patent: 3377022 (1968-04-01), Beatenbough et al.
patent: 3580502 (1971-05-01), Duchek
patent: 3770125 (1973-11-01), Franz
patent: 4007775 (1977-02-01), Caldwell
patent: 4007873 (1977-02-01), Duchek

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