Erecting/lying-down dam or sluice gate made of flexible sheet
AssigneeSumitomo Electric Industries, Ltd.
InventorsYoshiomi Tsuji, Ichiro Maruyama, Hiroshi Takuma
Life of this patent
Estimating the term…
Abstract
A dam with a flexible cover attached to a bottom sheet by fittings with corrugations formed between the fittings so that upon deflation the cover conforms to the surface of the corrugations, minimizing any floating cover portion. The corrugations may be formed as pipe-like members, as molded portions integral with the bottom sheet or as part of the concrete foundation. Preferably the length between the fittings measured along the corrugation surfaces is at least 1.1 times the linear length therebetween. The corrugations are also preferably recessed to extend no higher than the bottom of the riverbed.
Claims21
A collapsible dam or sluice gate which is expandable upon fluid supply therein and deflatable upon fluid discharge therefrom comprising:
- means for supporting said dam or gate disposed along a bottom of a river or the like having a plurality of corrugations formed integrally on an upper surface of said supporting means;
- a cover made of a flexible sheet which can expand and deflate;
- means for attaching said cover to said supporting means;
- and
- means for defining a lower interior surface, disposed along said upper surface of said supporting means corrugations so that said lower interior surface means has a corrugated shape and, upon discharge of said fluid, said cover is deflated to a position substantially near said corrugated shape of said lower interior surface means, and the length of a floating portion of said cover during deflation is therefore minimized.
A collapsible dam or sluice gate which is expandable upon fluid supply therein and deflatable upon fluid discharge therefrom comprising:
- means for supporting said dam or gate disposed along a bottom of a river or the like including:
- a foundation having an upper surface;
- and
- corrugation-forming members attached to said upper surface of said foundation;
- a cover made of a flexible sheet which can expand and deflate;
- means for attaching said cover to said supporting means;
- and
- means for defining a lower interior surface, disposed along said supporting means corrugation-forming members so that said lower interior surface means has a corrugated shape and, upon discharge of said fluid, said cover is deflated to a position substantially near said corrugated shape of said lower interior surface means, and the length of a floating portion of said cover during deflation is therefore minimized.
Dependencies are inferred from the claim text.