Riser check valve

Details Riser check valve Riser check valve

1988-05-03

1989-08-01

Fox, John

Fluid handling

Destructible or deformable element controlled

Destructible element

1375135, F16K 1502

Patent

active

048526029

ABSTRACT:
There is disclosed a check valve apparatus for use with risers in an irrigation system. The valve apparatus stops the flow of water when the respective riser is broken away from the water supply conduit. The valve apparatus has a conduit member and a valve member. The conduit member has an opening extending therethrough and between the ends of the conduit member. A shoulder positioned intermediate the conduit member ends projects inwardly. The valve member seats on the shoulder, wherein it is in the open position. When the riser is subjected to a sufficient amount of force, the coupling member severs at a weakened portion, thereby severing the shoulder and allowing the valve member to close to minimize the flow of water.

REFERENCES:
patent: 2804317 (1957-08-01), Prater
patent: 4364407 (1982-12-01), Hilliard
patent: 4562962 (1986-01-01), Hartman
patent: 4762140 (1988-08-01), Davis

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