Siphon freeze drain valve for underground irrigation systems

Details Siphon freeze drain valve for underground irrigation systems Siphon freeze drain valve for underground irrigation systems

1995-03-24

1997-06-24

Michalsky, Gerald A.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

137140, 137152, 137517, 239111, 251146, 285197, F16K 2404

Patent

active

056409915

ABSTRACT:
Siphon freeze drain valve for an underground water sprinkling system including a line operating under water pressure, the drain valve being a U-shaped tube, one end of which is passed through a hole in the top of the line, the other end of which is outside the line at a lower level than the first end. A clamp and a seal holds the tube in the line against the force of the water in the line and prevents leaking around the tube. A check valve is in the end of the tube outside the line, the check valve selectively opened and closed to control flow through the tube and for establishing a siphon for draining the line.

REFERENCES:
patent: 514733 (1894-02-01), Seifert
patent: 673546 (1901-05-01), Nye
patent: 1297001 (1919-03-01), O'Shields
patent: 1438973 (1922-12-01), Van Der Volgen
patent: 3779276 (1973-12-01), King, Sr.
patent: 4248258 (1981-02-01), Devitt et al.
patent: 4291855 (1981-09-01), Schenkel et al.
patent: 4479482 (1984-10-01), Cherington
patent: 4682579 (1987-07-01), Bigham
patent: 4890640 (1990-01-01), King, Sr.

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