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Collapsable-dam

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Collapsable dam

Details

Inventors: Suga, Kyozo; Iizuka, Jinya; Tsuji, Yoshiomi;
Assignee: Kazuto Nakazawa, General Director Public Works Research Institute (Tokyo, JP); Sumitomo Electric Industries, Ltd. (Osaka, JP)
Primary Examiner: Taylor; Dennis L.
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak and Seas

A deformable dam made of an impermeable flexible membrane secured in a water tight manner to the bottom and side walls of a river. The flexible membrane is inflatable using either air or water, or a combination to vary the overall effective length of the dam.

DETAILED DESCRIPTION Accordingly, in view of the above noted defects, an object of the present invention is to provide a flexible dam having at least one hollow bag made of impermeable material, the bag being charged or discharged with fluid to thereby vary the circumference.
Various modifications of the hollow bag are considered to be within the scope of this invention.
For example, a plurality of cylindrical units are made of impermeable flexible membranes.
The cylindrical units are sealingly connected one by one in the diametric direction.
The connected cylindrical unit body is watertightly secured to the bed and the side banks of the river to thereby form a flexible dam.

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