Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1992-11-16
1994-06-14
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
417 44B, 417 44H, 285 89, F04B 4908
Patent
active
053204956
ABSTRACT:
A pressure switch adaptor designed to replace existing pressure switch adapters or connections and pressurizing air valves conventionally associated with water storage and distribution tanks. The adaptor is designed to be used as original equipment on new water tanks or to retrofit existing tanks, replacing the pressurizing air valve conventionally provided by the latter. Whether used on a new tank or retrofitting a used tank, the pressure switch adaptor fits into the port conventionally reserved for the pressurizing air valve. The adaptor provides a pressurizing air valve to allow initial pressurization of the air filled diaphragm and a pressure switch connection for fluid communication between an internal tank diaphragm and the pressure switch, which controls actuation of the tank's water-supplying pump. By placing the pressure switch adaptor on the air side of the system, problems associated with corrosion and corruption of the switch due to prolonged contact with water are eliminated. The pressure switch adaptor improves upon known pressure switch adaptors which require a separate access port, or which are placed on the water side of the system.
REFERENCES:
patent: 3650324 (1972-03-01), Randles et al.
patent: 3679326 (1972-07-01), Weber
patent: 3994624 (1976-11-01), Plunkett et al.
patent: 4304526 (1981-12-01), Shetler, Sr.
patent: 5147530 (1992-09-01), Chandler et al.
Bertsch Richard A.
Essef Corporation
Scheuermann David W.
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