US PATENT SUBCLASS 405 / 94
.~.~.~.~ To pressure on pivoted water gate

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

52  DF  FLUID CONTROL, TREATMENT, OR CONTAINMENT {7}
80  DF  .~ Flow control {7}
87  DF  .~.~ Water gate or adjustable weir {7}
92  DF  .~.~.~ Condition responsive {3}
94.~.~.~.~ To pressure on pivoted water gate {1}
95  DF  .~.~.~.~.~> With latch for closed position

DEFINITION

Classification: 405/94

To pressure on pivoted water gate:

(under subclass 92) Method or apparatus wherein a variation in the head of an accumulated body of liquid acting against a swinging water gate is effective to open or close the gate.