Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent
1983-04-28
1985-09-17
Rosenthal, Arnold
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
137 74, 251328, 251174, F16K 1738, F16K 302
Patent
active
045414491
ABSTRACT:
An improved gate valve having a body with an inlet into the valve chamber and an outlet from the chamber, a gate in the chamber, a bonnet with an opening therethrough, secured to the body, a stem connected to operate the gate and extending through the bonnet opening, a seat in the bonnet, a shoulder on the stem, heat responsive means holding the stem out of back seating position during normal operation and releasing to back seat responsive to excess heat, body bushing surrounding said inlet and outlet and sealing against the gate, each of the bushings having resilient sealing means and a sealing lip for sealing against a sealing surface on said body.
REFERENCES:
patent: 1488296 (1924-03-01), Stevens
patent: 2985421 (1961-05-01), Anderson et al.
patent: 3006599 (1961-10-01), Eckert, Jr.
patent: 3273855 (1966-09-01), Wells
patent: 3307826 (1967-03-01), Lowrey
patent: 4124194 (1978-11-01), Alvarez
patent: 4290581 (1981-09-01), Moran et al.
Burke James S.
Fisher Edmund A.
Miller David L.
Cameron Iron Works, Inc.
Rosenthal Arnold
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