Check valve assembly

Details Check valve assembly Check valve assembly

1975-04-25

1976-08-10

Klinksiek, Henry T.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

13751611, E21B 4300

Patent

active

039735877

ABSTRACT:
A check valve assembly for use in a flow conductor. A tubular valve body with a central flow passage is mounted in the assembly. A spring urges the body toward closed position in which a rigid sleeve encircles and covers outlet ports in the downstream end of the body. A resilient skirt of rubber extending from the end of the sleeve engages the outer surface of the body to form a seal which prevents reverse fluid flow through the valve. The rigid sleeve isolates the ports from high reverse pressure differentials. Forward flow, or a sufficiently great forward pressure differential, overcomes the spring bias and pushes the downstream end of the tubular body through the bottom of the sleeve and skirt to a position in which the outlet ports are uncovered for normal flowing operation. The spring returns the valve body to closed position when the flow reverses or the forward pressure differential falls below a prescribed value.

REFERENCES:
patent: 3090443 (1963-05-01), Bostock
patent: 3794112 (1974-02-01), Hill

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