Thermally responsive valve

Details Thermally responsive valve Thermally responsive valve

1985-09-03

1989-02-14

Wayner, William E.

Automatic temperature and humidity regulation

Thermostatic

Expanding fluid

251362, G05D 2312

Patent

active

048041416

ABSTRACT:
A three-port vacuum valve (10) having a thermally responsive actuator (38)n and a moveable valve member (62) with a single seal ring (66) thereon. A vacuum signal output port (24) is disposed between spaced primary (26) and secondary (22) vacuum source ports. A first (74) and a second (68) annular tapered valve seats are disposed in opposing relationship closely spaced adjacent said output port with said seal ring disposed therebetween. The valve seats are spaced such that upon said actuator experiencing a preselected temperature the seal ring is unseated from the second valve seat and is between the valve seats. Upon the actuator experiencing a given temperature differential from said preselected temperature, said seal ring seats against said first valve seat.

REFERENCES:
patent: 2368206 (1945-01-01), Du Charme
patent: 4085775 (1978-04-01), Steele, Jr.
patent: 4375873 (1983-03-01), Enomoto et al.

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