Dual function thermal valve

Details Dual function thermal valve Dual function thermal valve

1975-12-18

1977-05-31

Wayner, William E.

Automatic temperature and humidity regulation

Snap-acting

Including a permanent magnet

123117A, 1376255, 236 87, 236101B, G05D 2310

Patent

active

040264645

ABSTRACT:
An improved, dual function, thermal valve assembly has three ports and two passages connecting these three ports to a common chamber. The assembly employs two thermally responsive actuating members which are actuable to move a valve plug in the chamber at different temperatures to provide a first temperature region wherein the plug seals port one so that only ports two and three are in communication, a second temperature region wherein the plug does not seal any of the ports so that ports one, two, and three are in mutual communication, and a third temperature region wherein the plug seals port three so that only ports one and two are in communication.

REFERENCES:
patent: 3329165 (1967-07-01), Lang
patent: 3540422 (1970-11-01), Kelly
patent: 3595474 (1971-07-01), Humpert
patent: 3704697 (1972-12-01), Weymann
patent: 3930515 (1976-01-01), Kennedy et al.
patent: 3960321 (1976-06-01), Steele, Jr.

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