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Class Information
Number: 405/91
Name: Hydraulic and earth engineering > Fluid control, treatment, or containment > Flow control > Water gate or adjustable weir > Removable > Flexible
Description: Method or apparatus wherein the removable gate is composed of a pliant material.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4921373 |
Barrier for containing floods |
May. 1, 1990 |
| 4906134 |
Self supporting flexible wall dams |
Mar. 6, 1990 |
| 4846603 |
Set-up/down plural-span weir assembly made of flexible sheets |
Jul. 11, 1989 |
| 4836713 |
Flexible sheet dams |
Jun. 6, 1989 |
| 4780024 |
Crest gate |
Oct. 25, 1988 |
| 4735525 |
Irrigation channel gates |
Apr. 5, 1988 |
| 4733990 |
Erecting/lying-down dam or sluice gate made of flexible sheet |
Mar. 29, 1988 |
| 4728221 |
Flexible membrane dam |
Mar. 1, 1988 |
| 4696598 |
Erecting/lying-down dam or sluice gate made of flexible sheet |
Sep. 29, 1987 |
| 4692060 |
Water-bag dam or dike and method |
Sep. 8, 1987 |
| 4661015 |
Rising and falling weir of flexible membrane |
Apr. 28, 1987 |
| 4647250 |
Canadian flexible dams |
Mar. 3, 1987 |
| 4511286 |
Flexible barriers |
Apr. 16, 1985 |
| 4498454 |
Method of and means for seasonally storing heat in a body of water |
Feb. 12, 1985 |
| 4498810 |
Collapsible rubber dam |
Feb. 12, 1985 |
| 4352591 |
Pneumatic toroidal weir |
Oct. 5, 1982 |
| 4314774 |
Pneumatically inflatable flexible envelope type dam |
Feb. 9, 1982 |
| 4310262 |
Collapsible dam and apparatus for raising and lowering the dam |
Jan. 12, 1982 |
| 4279540 |
Collapsable dam |
Jul. 21, 1981 |
| 4252461 |
Maneuverable dam |
Feb. 24, 1981 |
| 4229119 |
Liftable and collapsible barrage |
Oct. 21, 1980 |
| 4089180 |
Long-life floodgate |
May. 16, 1978 |
| 4031676 |
Water blocking device |
Jun. 28, 1977 |
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