Relief valve

Details Relief valve Relief valve

1987-06-29

1988-01-26

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137377, 137538, F16K 3112

Patent

active

047211296

ABSTRACT:
A relief valve for relieving pressure in a system and sealing the same from incoming rain or other moisture or foreign material after relief of pressure. The valve has a spring biased piston which operates internally of the valve to relieve pressure, then reseal in an air-tight manner.

REFERENCES:
patent: 2681074 (1954-06-01), Freutzel
patent: 2820475 (1958-01-01), Hobbs
patent: 3587623 (1971-06-01), Wilson
patent: 3826280 (1974-07-01), Perham
patent: 4112971 (1978-09-01), Nilson
patent: 4267858 (1981-05-01), Lewis

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