Power plants – Pressure fluid source and motor – Having a mechanical clutch or brake device in the power train
Patent
1985-02-05
1986-10-07
Michalsky, Gerald A.
Power plants
Pressure fluid source and motor
Having a mechanical clutch or brake device in the power train
60468, F15B 1500
Patent
active
046151745
ABSTRACT:
A fluid pressure control circuit for operating a bidirectional hydraulic motor comprises first and second main conduits for selectively supplying the pressurized fluid delivered by a main hydraulic pump through a pilot fluid pressure operated three-position directional control valve and via a brake valve device into first and second ports of the bidirectional hydraulic motor; two pilot fluid supply conduits located in parallel relationship with each other for selectively supplying the pressurized fluid delivered by an auxiliary hydraulic pump as a pilot fluid pressure through a three-position directional control valve into the left and right pressure receiving portions of said pilot fluid pressure operated three-position directional control valve; a conduit for selectively supplying the pressurized fluid delivered by the auxiliary hydraulic motor through a solenoid operated control valve into the pressure chamber of a gyratory brake device; and a conduit for short-circuiting said two pilot fluid supply conduits by means of a solenoid operated neutral valve. The solenoid of said solenoid operated control valve and that of said solenoid operated neutral valve are electrically connected so as to be energized and deenergized in synchronous relationship.
Kabushiki Kaisha Komatsu Seisakusho
Michalsky Gerald A.
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