Hydraulic and earth engineering – Drainage or irrigation – Having regulation of flow through channel
Patent
1985-01-11
1986-11-11
Husar, Cornelius J.
Hydraulic and earth engineering
Drainage or irrigation
Having regulation of flow through channel
405 37, 137451, E02B 1100, E02B 1300
Patent
active
046219455
ABSTRACT:
In association with a subsurface drainage/irrigation tile system, a head control stand is provided to selectively control the flow of water through a drainage/irrigation tile system and in turn control the depth of the water table. An actuating unit which includes a water level sensor floating on the surface of the water table is disposed within a riser pipe which extends upward from a subsurface drainage tile. A valve disposed within the drainage tile is connected to the water level sensor and opens upon the sensor raising in response to a raising in the water table which allows water to flow through the valve and subsequently closes the valve upon lowering of the water table.
REFERENCES:
patent: Re27353 (1972-05-01), Shettel
patent: 2868492 (1959-01-01), Volcov et al.
patent: 2896904 (1959-07-01), Northup
patent: 2923308 (1960-02-01), Shohan
patent: 3779276 (1973-12-01), King
patent: 4353524 (1982-10-01), Spendlow
patent: 4484728 (1984-11-01), Moore
Schafer Charles J.
Schafer Christopher E.
Schafer William P.
Birkenholz James D.
Husar Cornelius J.
Stodola Nancy J.
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