Plunger pump of quick pressure-rise type

Details Plunger pump of quick pressure-rise type Plunger pump of quick pressure-rise type

1987-11-20

1989-07-25

Smith, Leonard E.

Pumps

Successive stages

With interstage discharge or additional discharge from...

F04B 300

Patent

active

048508284

ABSTRACT:
In a plunger pump system of a quick pressure-rise type which is utilized for increasing the pressure of a working fluid to be supplied quickly to a hydraulic actuator, such as an oil hydraulic cylinder, both a high pressure plunger pump and a quick-charging pump are connected interlockingly to one prime mover so as to be driven synchronously. During a low pressure range of operation, a large amount of working fluid delivered from a quick-charging plunger chamber is adapted to be supplied to the hydraulic actuator through a high pressure plunger chamber. On the other hand, during a high pressure range of operation, a small amount of high pressure working fluid is adapted to be delivered from the high pressure plunger chamber to the hydraulic actuator. Under this high pressure delivery condition of a small amount of working fluid, the working fluid is adapted to be controlled by a check valve so as to pass through the quick-charging plunger chamber in the regular direction from the suction side to the delivery side thereof.

REFERENCES:
patent: 1760070 (1930-05-01), Kinsella
patent: 2472802 (1949-06-01), Bentley
patent: 2530682 (1950-11-01), Coldsnow
patent: 2653543 (1953-09-01), Mott
patent: 2820415 (1958-01-01), Born
patent: 3536421 (1970-10-01), Kemp
patent: 3578880 (1971-05-01), Cygnor
patent: 3776665 (1973-12-01), Dalton
patent: 4538966 (1985-09-01), Nikaido

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