Springloaded shutoff valve apparatus

Details Springloaded shutoff valve apparatus Springloaded shutoff valve apparatus

1986-08-04

1987-07-28

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

13753325, 137542, 13754323, F16K 1502

Patent

active

046826254

ABSTRACT:
Shutoff valve apparatus includes a spring-loaded piston with two guide portions disposed in bores and the piston includes a fluid passage extending through the piston and communicating with one of the bores in which a guide element is disposed. Any back pressure works with the bias of the spring to help seat the valve piston to prevent fluid from leaking past the valve. Positive pressure from the working fluid opens the valve.

REFERENCES:
patent: 2670922 (1954-03-01), Carlisle
patent: 2886058 (1959-05-01), Horton
patent: 2960998 (1960-11-01), Sinker
patent: 2977980 (1961-04-01), Scholin

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