Pressure relief valve

Details Pressure relief valve Pressure relief valve

1976-07-19

1978-10-10

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

Destructible element

220 89A, 222396, F16K 1740

Patent

active

041191129

ABSTRACT:
A safety vent for hopper cars includes a tubular housing member adapted to communicate with the interior of a hopper which may be unloaded by creating a sub-atmospheric pressure therein. The vent includes a rupturable diaphragm normally blocking the entrance of air through the tubular housing to the hopper. The diaphragm comprises a material which is stretched across a tubular wall of the tubular member in a tensioned condition, and which at a predetermined PSI within the hopper, ruptures whereupon the ruptured pieces of the diaphragm recede radially outwardly against the wall of the tubular housing in a manner to occupy a minimal amount of space thereby permitting the free flow of air into the hopper.

REFERENCES:
patent: 776834 (1904-12-01), Goebel
patent: 3145874 (1964-08-01), Webb
patent: 3229635 (1966-01-01), Oss
patent: 3469734 (1969-09-01), Davis et al.
patent: 3515309 (1970-06-01), Welch
patent: 3845878 (1974-11-01), Carlson

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