Continuously operable hydraulic device

Pumps – Expansible chamber type – Moving cylinder

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Details

417488, F04B 1900, F04B 1922

Patent

active

047309920

ABSTRACT:
This invention relates to a continuously operable hydraulic device usable as either a hydraulic pump or a hydraulic motor, including a plurality of unit hydraulic devices each having a pair of plungers. Operational association between these unit hydraulic devices makes it possible to discharge fluid at an accurate flow rate continuously or by a predetermined value, or to supply the fluid to rotate a driven component. Four pairs of plungers 51 and 56 are inserted into a port block 20 having a sucking port 25 and a discharge port 26 with the end faces thereof being opposed to each other. These plungers 51 and 56 are moved along a pair of cam surfaces 68A and 68B of a cam 68 by cam followers 69 and 70 which are connected to the plungers 51 and 56 via plunger driving shafts 73 and 75. These pairs of plungers 51, 56, the cam followers 69, 70 and the like constitute the unit hydraulic device 95. The unit hydraulic devices 95, in case of being as the hydraulic pump, are operated in operational association with the driving of the cam 68, and, in case of being as the hydraulic motor, are operated as the rotation of the cam 68 by the supplies of the fluid to spaces formed between the plungers 51 and 56.

REFERENCES:
patent: 1143325 (1915-06-01), Sherman
patent: 2447467 (1948-08-01), Palm
patent: 2705835 (1955-04-01), Massmann
patent: 3704080 (1972-11-01), Cross
patent: 4405294 (1983-09-01), Mcbarda
patent: 4492524 (1985-01-01), Koch

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