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Class Information
Number: 405/98
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Water gate or adjustable weir > Roller or flexible
Description: 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.

Patents under this class:

Patent Number Title Of Patent Date Issued
4484728 Rolling seal sluice gate Nov. 27, 1984
4103496 Collapsible and expansible barrage Aug. 1, 1978

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