Check valve

Details Check valve Check valve

1992-07-02

1994-04-05

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

13751629, F16K 1502

Patent

active

052995984

ABSTRACT:
A check valve is disclosed for permitting a fluid flow in a generally one direction. The check valve is provided with an elongated housing with a central passageway within which a valve member moves for permitting a fluid flow in one direction and for closing a fluid communication when moving in an opposite direction. The valve member has a conically-shaped groove for receiving a sealing member therein. When the sealing member becomes expanded under the influence of fluids passing through the check valve, it is allowed to move from the groove along a neck of the valve member. The interior wall housing is provided with plurality of longitudinal grooves extending in parallel relationship to a central axis of the housing in that part of the housing wherein the valve member moves. The longitudinal grooves ensure fluid flow through the valve member at all times.

REFERENCES:
patent: 1322938 (1919-11-01), Parker
patent: 1443675 (1923-01-01), Bowler
patent: 2481482 (1949-09-01), Green
patent: 2912000 (1959-11-01), Green
patent: 2912001 (1959-11-01), Green
patent: 3580275 (1971-05-01), Hanson
patent: 3735777 (1973-05-01), Katzer

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