Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Means to regulate or vary operation of device
Patent
1975-05-21
1976-12-07
Shapiro, Jacob
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
Means to regulate or vary operation of device
61 18, 61 22R, 61 25, 1375276, 251147, E02B 1300, F16K 1712, E02B 740
Patent
active
039954358
ABSTRACT:
A fluid flow control means particularly for controlling water flow in irrigation systems such as open course or socalled "Border Dyke" systems in which there are a series divided land areas to be irrigated in turn. There being a control means at each division and each control means includes a flap member pivotally suspended across the flow path of the water so as to be movable in controlling the water flow, and a collapsible chamber (which can be defined by a bellows arrangement) arranged to act on and effect movement of the flap member, there being an inlet to the chamber or bellows in communication with the upstream side of the water course and an outlet arranged to enable water to flow from the chamber or bellows at a greater rate than into the chamber or bellows, and secondary control valve means actuable to close off said outlet in response to the existence of a predetermined amount or level of water at a predetermined position downstream of the flap, so that water is allowed to accumulate in the chamber or bellows and cause a force to act on the adjacent face of the flap member and move such flap member to a position closing off or at least restricting the water flow. The invention also includes irrigation systems incorporating the control means.
REFERENCES:
patent: 635206 (1899-10-01), Taylor
patent: 1166991 (1916-01-01), Jones
patent: 3114243 (1963-12-01), Winters
patent: 3710821 (1973-01-01), Turetsky et al.
G. Methven & Co., Limited
Shapiro Jacob
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