Differential pumping system

Details Differential pumping system Differential pumping system

1980-05-30

1982-05-04

Marbert, James B.

Fluid sprinkling, spraying, and diffusing

With cleaning means, drip collecting, waste disposal or soil...

239 61, 239304, B05B 128, A62C 1360

Patent

active

043278663

ABSTRACT:
A pumping system for use in a self-service car wash for supplying liquid at a high or low-pressure having a pump in communication with a liquid applicator and in communication with a first liquid supply. A second liquid supply is in communication with an inlet portion of the pump through a supply valve which selectively permits liquid to be drawn from one of the liquid supplies. A by-pass mechanism, in communication with the pump, is provided to reduce the pressure of the liquid supplied from the pump to the liquid applicator. A control mechanism is connected to the supply valve and the by-pass mechanism whereby when the control mechanism is activated the supply valve and the by-pass mechanism are actuated and liquid from the second liquid supply is supplied to the liquid applicator at a pressure lower than liquid supplied from the first liquid supply.

REFERENCES:
patent: 3049302 (1962-08-01), Simmons, Jr.
patent: 3276628 (1966-10-01), Cline
patent: 4019653 (1977-04-01), Scherer et al.

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