Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1997-06-20
1999-10-12
Michalsky, Gerald A.
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
137517, 137550, 137843, F16K 2404
Patent
active
059642416
ABSTRACT:
A 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.
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Fig. 1A-Fig 1B Drain sold by Aspen Earth, 387 West 5900 South Murray, Utah 84107.
Fig. 2A-Fig 2B Drain sold by King Brothers Industries, 27781 Avenue Hopkins, Valencia, California 91355.
Fig. 3A-Fig. 3B Drain sold by Orbit Underground Sprinklers, P.O. Box 328, Bountiful, Utah 84011.
Fishel Grace J.
Michalsky Gerald A.
Tom King Harmony Products, Inc.
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