Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Patent
1993-03-12
1994-03-29
Schwadron, Martin P.
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
137 77, 251 74, F16K 3164
Patent
active
052980880
ABSTRACT:
A valve closer for a valve installed in a flow line of a flammable liquid or other hazardous flowable material which is normally open with the closer of the present invention automatically moving the valve to closed position by turning the valve one-quarter of a turn when a fusible link is rendered inoperative when subjected to predetermined high temperature conditions which may occur in the event of a fire. The fusible link, when rendered inoperative, will release a pivotal latch that is engaged with and will release a spring biased actuating member that will rotate the valve stem one-quarter turn to close the valve and interrupt the flow of material through the flow line in which the valve is installed. The valve stem is provided with a cam in the form of a generally circular flange rigid therewith having an arcuate recess with one edge of the recess being engaged by an offset portion of the spring biased actuating member with the construction of the recess and offset portion of the actuating member limiting the rotational movement of the cam, valve stem and valve to one-quarter turn.
REFERENCES:
patent: 1966735 (1934-07-01), Sackett
patent: 2008961 (1935-07-01), Lessard
patent: 4004601 (1977-01-01), Bachelder et al.
patent: 4890635 (1990-01-01), Gray, Jr.
patent: 4960147 (1990-10-01), Diamond
patent: 5004003 (1991-04-01), Gray, Jr.
Lee Kevin L.
Schwadron Martin P.
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