US PATENT SUBCLASS 405 / 98
.~.~.~ Roller or flexible

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}
98.~.~.~ Roller or flexible

DEFINITION

Classification: 405/98

Roller or flexible:

(under subclass 87) Method or apparatus wherein the water gate (a) is a cylindrical structure which rotates about its axis to open and close, or (b) is made of sections, flexibly

interconnected which opens and closes by being rolled, folded, or bent out of its closed position plane.