Check valve having internal float

Details Check valve having internal float Check valve having internal float

1992-09-08

1994-06-07

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 43, 417295, 4172975, 417300, 137399, 13751625, 137539, F04B 2102

Patent

active

053184076

ABSTRACT:
The present invention provides a check valve which, when placed at the end of a pump suction pipe, allows the pump to draw fluid therethrough from a continuously replenished, below-ground fluid source. When the fluid in the fluid source has been depleted to a level below that which allows fluid to be drawn therefrom by the pump, the present check valve maintains the suction pipe full of fluid. The check valve also maintains the suction pipe full of fluid when the pump has been shut off. In this manner, the pump can resume drawing fluid from the fluid source without the need for priming.

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