Collapsible and expansible barrage

Details Collapsible and expansible barrage Collapsible and expansible barrage

1977-04-11

1978-08-01

Shapiro, Jacob

61 25, E02B 740

Patent

active

041034961

ABSTRACT:
A collapsible and expansible barrage comprising a threshold structure dised at the bottom of the waterway, a metallic flap, provided with an upturned-glass type of air-tank, hinged to said threshold structure, and a flexible sheet connected at one of its end to the threshold structure and to the other end to the threshold structure; the flap and the threshold structure are further connected one to the other by means of a damped tie-rod.

REFERENCES:
patent: 495788 (1893-04-01), Debarle
patent: 735387 (1903-08-01), Irwin
patent: 1040112 (1912-10-01), Ashford et al.
patent: 1841747 (1932-01-01), Lun
patent: 3069861 (1962-12-01), Berke et al.

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