Combination employing controlled flow check valve

Details Combination employing controlled flow check valve Combination employing controlled flow check valve

1976-09-20

1978-03-28

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1502

Patent

active

040809889

ABSTRACT:
In a combination including a communications conduit containing pressurized fluid and a smaller conduit sealingly connected therewith for testing the pressure of the fluid therewithin, an improvement characterized by a controlled flow check valve connected serially with the smaller conduit and sealingly with the communications conduit, the controlled flow check valve having a conventional poppet and seat means for allowing full flow in one direction for pressurizing and blocking reverse flow for preventing depressurizing; and a controlled flow bypass structure allowing a controlled reverse flow sufficient to permit testing of pressure but insufficient to bleed the pressurized fluid from the communication conduit in a short time. Also disclosed are the specific preferred structural embodiments that are economical and readily manufactured in contrast to elaborate apparatus enabling accomplishing a similar result in the prior art.

REFERENCES:
patent: 1844613 (1932-02-01), Thompson
patent: 3592223 (1971-07-01), Reese
patent: 3603344 (1971-09-01), Stampfli

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