Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1975-12-29
1977-04-12
Weakley, Harold W.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
137315, F16K 1726
Patent
active
040169049
ABSTRACT:
A safety valve for pressure-venting sealed, fluid-holding drums, or other containers, to prevent explosions, and providing for admission of ambient atmosphere to the container, to equalize internal and external pressures and thereby permit fluid to be withdrawn from the container. The valve shell comprises a capped tube, which has only a single thread formed thereon, and a plurality of shelf-like abutments which extend peripherally of interior wall portions of the tube and are shaped and disposed to provide support for interior, nested, valve parts, including a pair of flame-retardant screens, a pair of oppositely displaceable valving devices, valve seat structure, and spring means to establish the loading of each of said devices.
REFERENCES:
patent: 1493083 (1924-05-01), Ripley
patent: 2103935 (1937-12-01), Cossais
patent: 3092137 (1963-06-01), Van Eldikthieme
patent: 3108610 (1963-10-01), De See
patent: 3304952 (1967-02-01), Krone
Central Safety Equipment Co.
Weakley Harold W.
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