Flap gate assembly
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United States of America Patent
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-
Jan 31, 1989
Grant Date -
N/A
app pub date -
Jun 18, 1987
filing date -
Jun 18, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flap gate installation for systems where liquids are pumped into a holding tank has a fabricated frame surrounding the port of the conduit which opens into the tank. A flap gate is hingedly connected to the top of the frame and has concavo-convex walls welded to a gate frame with the convex surfaces of the walls the outer surface of the gate. The flap gate is held seated and sealed against the installed frame not only by its weight but by the head on stored liquids and is opened against that head by pumping pressures on liquid to be delivered into the holding tank. the cancavo-convex walls of the gate enable the weight of the gate to be substantially reduced with a corresponding reduction in pumping costs.
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