Valves and valve actuation – Plural motions of actuator
251100, 251 98, 251235, 1376362, F16K 3144
A frost-free hydrant includes a reservoir below the frost line which is completely sealed from ground water and which is emptied by a venturi in the valve when the hydrant is used. An indicator raised by a float warns of undue accumulation of water in the reservoir and seals the air vent to the reservoir. An actuating handle for the valve is depressed to permit water to flow and may be swung laterally in either direction to hold any adjustment from trickle to full flow. Anti-siphoning openings are included in the valve actuating rod.
patent: 781525 (1905-01-01), Isaacs
patent: 2945703 (1960-07-01), Ballard
patent: 3384121 (1968-05-01), Spencer
Cline William R.
Spiegel H. Jay
Whitewater Mfg. Co.
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