Power plants – Pressure fluid source and motor – Having a mechanical clutch or brake device in the power train
Patent
1986-03-28
1987-09-22
Look, Edward K.
Power plants
Pressure fluid source and motor
Having a mechanical clutch or brake device in the power train
60468, 60493, 60494, 91461, F16D 3102
Patent
active
046946470
ABSTRACT:
A hydraulic circuit system for use in hydraulically operated vehicles having a bidirectionally rotatable hydraulic motor with a brake unit, a directional control valve for controlling a pressurized fluid supply to the motor, bypass circuits connected between a fluid supply circuit and a drain circuit, a shadow valve provided in the bypass circuits, and an ON-OFF changeover valve provided in the bypass circuits for allowing the bypass circuits to connect with and disconnect from the shadow valve. The system further includes a cavitation preventing circuit device connected through check valves between the bypass circuits and the shadow valve so as to allow the bypass circuits to communicate with each other in co-operation with the shadow valve.
REFERENCES:
patent: 4194365 (1980-03-01), Stoufflet et al.
patent: 4481770 (1984-11-01), Lohbauer et al.
patent: 4495767 (1985-01-01), Akiyama et al.
patent: 4586332 (1986-05-01), Schexnayder
patent: 4615174 (1986-10-01), Nagahara
Kabushiki Kaisha Komatsu Seisakusho
Look Edward K.
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