Unloading arrangement for hydraulic swing circuit or the like

Details Unloading arrangement for hydraulic swing circuit or the like Unloading arrangement for hydraulic swing circuit or the like

1980-09-15

1983-05-10

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

60451, 60465, 60468, F16H 3946

Patent

active

043823602

ABSTRACT:
A closed loop hydraulic swing circuit is provided with crossover auxiliary actuating connections between the pump control lines and the system relief valves to cause the relief valves to open at lower than maximum system pressure in an unloading action that limits braking when a coasting load is causing the motor to return more fluid than the pump can accept.

REFERENCES:
patent: 2501483 (1950-03-01), Taylor
patent: 2588928 (1952-03-01), Humpal et al.
patent: 2643515 (1953-06-01), Harsch
patent: 2841960 (1958-07-01), Holan et al.
patent: 3011652 (1961-12-01), Falk et al.
patent: 3555817 (1971-01-01), Hann
patent: 3981374 (1976-09-01), Johns
patent: 3999387 (1976-12-01), Knopf

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