Pump pressure control device

Details Pump pressure control device Pump pressure control device

1975-10-09

1976-12-14

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

By controlling internal combustion drive engine

F04B 4900

Patent

active

039972828

ABSTRACT:
A pump pressure control device includes a slidably mounted throttle control cylinder having a piston connected to a pump engine throttle to vary the speed of the engine. One side of the piston in the throttle control cylinder is open to pressure from an accumulator having a diaphragm or bladder therein. The accumulator, on the side of the bladder opposite the side open to the control cylinder, is precharged to a desired pressure. The other side of the control cylinder piston is open to the pressure in the pump output line which it is desired to regulate. The regulated pump discharge pressure is adjusted by sliding the control cylinder with respect to a fixed base. A directional flow valve functions to reverse the connections to the throttle control cylinder when the discharge pressure drops below a predetermined minimum.

REFERENCES:
patent: 1566376 (1925-12-01), County
patent: 2642805 (1953-06-01), Nepper
patent: 2982260 (1961-05-01), Hunter
patent: 3116694 (1964-01-01), Eberhardt

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