Combination check-overpressure relief valve

Details Combination check-overpressure relief valve Combination check-overpressure relief valve

1980-07-14

1982-07-27

Scott, Samuel

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

137846, 137847, F16K 1718

Patent

active

043412394

ABSTRACT:
A combination check-overpressure relief valve includes a cylindrical main body portion defining a flow path through the valve and terminating in a curved lip portion having a radius of curvature extending perpendicularly to the flow path. The curved lip portion has a normally closed slit formed through it which opens to flow in one direction but checks flow in an opposite direction until a certain pressure is exceeded, at which the valve relieves to allow flow in the opposite direction. The valve will thereafter automatically reset to its original checking position once the pressure has dropped sufficiently. If desired the pressures at which flow can occur through the valve may be increased by providing the valve with stiffening ribs projecting radially outwardly of the main body portion.

REFERENCES:
patent: 3155110 (1964-11-01), Hoffman
patent: 3159176 (1964-12-01), Russell et al.
patent: 3504699 (1970-04-01), Grise
patent: 3517682 (1970-06-01), Smith
patent: 4181145 (1980-01-01), Mitchell

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