Thermally responsive valve device

Details Thermally responsive valve device Thermally responsive valve device

1980-09-25

1981-12-01

Tapolcai, Jr., William E.

Automatic temperature and humidity regulation

Snap-acting

Including a permanent magnet

123568, 1376372, 236 87, 236101C, G05D 2310

Patent

active

043031951

ABSTRACT:
A thermally responsive valve includes first and second bimetallic disks which are adapted to snap-over in response to first and second predetermined temperatures. First and second inlet ports are connected to vacuum and atmospheric pressure sources respectively and first and second outlet ports are connectable to first and second vacuum actuators respectively. The thermally responsive valve further includes first and second valve members, one of which controls the communication of vacuum to the first vacuum actuator in response to the snap-over action of the first bimetallic disk and the other of which controls the application of vacuum to said second vacuum actuator in response to the snap-over action of the second bimetallic disk. When communication between the vacuum source and the first and second vacuum actuators is interrupted by said first and second valve members, the first and second actuators will be then connected to the atmosphere through the second inlet port.

REFERENCES:
patent: 4076172 (1978-02-01), Inada et al.
patent: 4117976 (1978-10-01), Doherty, Jr.
patent: 4128203 (1978-12-01), Maltby
patent: 4157158 (1979-06-01), Kitamura et al.
patent: 4182485 (1980-01-01), Kitamura

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