Distribution valve for irrigation channels

Details Distribution valve for irrigation channels Distribution valve for irrigation channels

1975-11-24

1976-09-28

Taylor, Dennis L.

Valves and valve actuation

Rotary valves

Ball valve

61 22A, 251 61, E02B 740

Patent

active

039824004

ABSTRACT:
One or more domed valve closure members are operable to open and close ports in the side walls of irrigation channels. Each closure member is cantilevered by a semi-flexible arm from a frame that has a pivot point lying in a plane substantially coincident with the plane of the sealing surface of the valve. A pneumatic bellows, which may be remotely controlled, exerts pressure to close the closure member against the sealing surface of the wall about the port. An adjustable limit stop fixes the degree of opening of the closure member as it swings arcuately away from the valve port to open. A manual control lever with an adjustable limit stop and an over-center locking arrangement replaces or supplements the pneumatic closure arrangement.

REFERENCES:
patent: 1334354 (1920-03-01), Dodd
patent: 1597371 (1926-08-01), Gfeller
patent: 1738051 (1929-12-01), Harker
patent: 3588036 (1971-06-01), Harter
patent: 3945565 (1976-03-01), Lynch et al.

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