US PATENT SUBCLASS 405 / 87
.~.~ Water gate or adjustable weir


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.~.~ Water gate or adjustable weir {7}
88  DF  .~.~.~> Center flow
89  DF  .~.~.~> Uniform discharge
90  DF  .~.~.~> Removable {1}
92  DF  .~.~.~> Condition responsive {3}
98  DF  .~.~.~> Roller or flexible
99  DF  .~.~.~> Swinging {1}
103  DF  .~.~.~> Sliding {1}


DEFINITION

Classification: 405/87

Water gate or adjustable weir:

(under subclass 80) Method or apparatus relating to movable regulators which control the volume of water flowing through an open channel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, for an artificial barrier (e.g., dam, levee, etc.) constructed to obstruct the flow of a natural body of water.

SEE OR SEARCH CLASS

73, Measuring and Testing,

215, for weirs and water gates in combination and metering means.

251, Valves and Valve Actuation, appropriate subclasses for

gates employed other than in a Class 405 environment.