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.

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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.