US PATENT SUBCLASS 405 / 40
.~.~ At outlet or intake

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

36  DF  DRAINAGE OR IRRIGATION {7}
39  DF  .~ Having regulation of flow through channel {1}
40.~.~ At outlet or intake {1}
41  DF  .~.~.~> Riser or standpipe outlet or intake

DEFINITION

Classification: 405/40

At outlet or intake:

(under subclass 39) Method or apparatus wherein the control takes place at each point (a) of egress of water from a channel to the soil, or (b) of ingress of water from the soil to the channel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

87+, for water gates associated with open channels which do not have means to specialize them for irrigation.

108, for flow controllers in spillways for dams or levels.