Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1979-05-17
1981-12-08
Christian, Leonard D.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
417 83, F04B 4906
Patent
active
043045260
ABSTRACT:
A well system comprising a pump having an inlet and an outlet and a combined pressure regulating valve and pressure flow control tank. The tank comprises a hollow container having a diaphragm therein overlying an inlet connected to the outlet of the pump and an outlet connected to the system. The diaphragm is urged by a charge of gas in the container to normally seal the inlet and outlet to said chamber in the absence of fluid pressure from the pump sufficient to move the diaphragm away from the inlet and outlet. Thus, the combined pressure regulator valve and pressure tank functions as a flow control to insure that the flow from the outlet is substantially at a predetermined pressure and that when the pressure falls below a predetermined amount, the diaphragm seals against said inlet and the outlet to said chamber and maintains water in the outlet of the pump sufficient to maintain a prime on the pump and prevent the pump from running dry.
The flow control tank is further combined as a well yield control in a low-yield well system including a downstream water storage tank and associated pump motor control pressure switch so as to protect the pump by matching the yield of the well to the capacity of the pump. The flow control tank is also combined with a water storage tank to apportion the water supply from the water system to at least two separate water distribution systems to thereby assure that water supply to one distribution system has priority over the supply to the other, or vice versa, as desired. A plurality of the flow control tanks are also combined as back flow control valves to prevent water source contamination in the event of abnormally low pressures developing in the water supply system. The tank is also employed in a system for supplying liquid, such as fuel oil, to a battery of oil burners or the like, which are individually connectable to or disconnectable from the supply line, so as to automatically control the supply of the liquid at a uniform pressure to the burners.
REFERENCES:
patent: 2412107 (1946-12-01), Tannehill
patent: 2533428 (1950-12-01), Carpenter
patent: 2660953 (1953-12-01), Tinker et al.
patent: 3126029 (1964-03-01), Englesson
patent: 3482598 (1969-12-01), Bencic
patent: 3537357 (1970-11-01), Archer
patent: 3593744 (1971-07-01), Smith
patent: 3625256 (1971-12-01), Smith
patent: 3868972 (1975-03-01), Zirps
patent: 3876336 (1975-04-01), Nash
patent: 4124331 (1978-11-01), Taki
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