Pressure relief valve

Details Pressure relief valve Pressure relief valve

1989-06-29

1990-09-25

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Fluid opened valve requiring reset

137492, 137508, F16K 1712, F16K 31124

Patent

active

049586564

ABSTRACT:
A pressure relief valve has a hollow valve body with one or more vent ports in the side wall and a small pilot opening in a first end. A lightweight sleeve, closed at one end, telescopes over the first end of the valve body to close the vent ports. A pressure actuatable element is positioned on the outer surface of the valve body end so as to block the pilot opening therein until the pressure in the valve body exceeds a predetermined value. When the pressure actuatable element unblocks the pilot opening, the interior of the closed end of the sleeve is exposed to the pressure in the valve body, causing the lightweight sleeve to move relative to the valve body to open the vent ports. Suitable pressure actuated elements include a rolling ball or a spring biased closure plate.

REFERENCES:
patent: 359949 (1887-03-01), Wilson
patent: 382643 (1888-05-01), Fox
patent: 1117399 (1914-11-01), Kibele
patent: 2081462 (1937-05-01), McClure
patent: 2376971 (1945-05-01), Kleit
patent: 2408708 (1946-10-01), Tweedle
patent: 2520893 (1950-08-01), Stevenson
patent: 2532639 (1950-12-01), Payne
patent: 2805681 (1957-09-01), English et al.
patent: 2984254 (1961-05-01), Allen
patent: 3055391 (1962-09-01), Shuk et al.
patent: 3459218 (1969-08-01), Cranage
patent: 3603343 (1971-09-01), Keller
patent: 4681138 (1987-07-01), Giuliani

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