Control apparatus for hydraulic motor

Details Control apparatus for hydraulic motor Control apparatus for hydraulic motor

1985-09-13

1987-12-15

Look, Edward K.

Power plants

Pressure fluid source and motor

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

60445, 60465, 60488, 60489, 60493, F16D 3102

Patent

active

047123770

ABSTRACT:
A control apparatus for a hydraulic motor for use in a construction vehicle driven by hydraulic power has a hydraulic motor, a hydraulic pump serving as a pressurized fluid supply source, a manually operable directional control valve connected across supply and discharge conduits for the hydraulic motor, a brake valve section including a counterbalancing valve and a pair of relief valves all of which are connected across the conduits extending between the directional control valve and the hydraulic motor, and a selector valve for controlling the supply of control pressurized fluid introduced through a shuttle valve connected across the conduits into a displacement control cylinder contained in the hydraulic motor. The selector valve is of a pilot operated type remotely controlled by pilot pressurized fluid supplied from an external pressurized fluid supply source.

REFERENCES:
patent: 3601235 (1971-08-01), Huf
patent: 3625637 (1971-12-01), Kiwalle et al.
patent: 3734225 (1973-05-01), Kobald et al.
patent: 3736753 (1973-06-01), Roth
patent: 3788075 (1974-01-01), Holdeman et al.
patent: 4364230 (1982-12-01), Holmes
patent: 4481770 (1984-11-01), Lohbauer et al.
patent: 4520626 (1985-06-01), Nakajima et al.
patent: 4530416 (1985-07-01), Kassai

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