Explosion barring shutoff device

Details Explosion barring shutoff device Explosion barring shutoff device

1980-03-24

1981-07-21

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

92 85R, 173139, 188 1C, 188207, 251 635, 251284, 251326, F16K 31122, F16K 5100

Patent

active

042794021

ABSTRACT:
A shutoff device comprises a housing having a closable flow passage which is closed by a closing plate member which moves into a recess defined in said housing forming a receiving seat. The closing plate member is closed by the movement of a fluid pressure operated piston which moves the closing plate member rapidly into the closed position. In order to prevent the closing plate member from slamming into the valve seat and damaging the valve seat, there is provided a bolster member in the form of a stop which is disposed in the path of movement of a stop face connected to a piston rod of the fluid pressure's piston which is connected to the closing member. The bolster member is made of a material which is non-elastic but which deforms after it is contacted by the stop face to initially stop the closing plate member and is then deformed to permit final closing of movement of the closing plate member into a completely closed position engaged in the recess seat and also to absorb the closing force by its own deformation.

REFERENCES:
patent: 1769386 (1930-07-01), Orton
patent: 2010129 (1935-08-01), Baker
patent: 2925241 (1960-02-01), Baldwin
patent: 3053231 (1962-09-01), Fairchild
patent: 3321033 (1967-05-01), Benuska et al.
patent: 3687017 (1972-08-01), Lewis et al.

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