Apparatus for controlling a plurality of hydraulic motors...

Details Apparatus for controlling a plurality of hydraulic motors... Apparatus for controlling a plurality of hydraulic motors...

2005-02-22

2005-02-22

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Including fluid drive

C074S733100

Reexamination Certificate

active

06857986

ABSTRACT:
An apparatus for controlling a plurality of hydraulic motors and a clutch is capable of reliably implementing a sequence for engaging and disengaging the clutch and for fixing and clearing a zero tilt rotation amounts of the hydraulic motors, thereby preventing a speed change shock or load slip in the hydraulic motors. The apparatus includes zero tilt rotation fixing means (10A), a clutch (5), hydraulic vehicle speed detecting means (32A), and control valve means (30A) that releases an output command pressure to a return pressure connected to a tank (19) until a vehicle speed signal pressure to be received reaches a start pressure of a predetermined value, and begins to output the command pressure to the zero tilt rotation fixing means and the clutch when the vehicle speed signal pressure exceeds a predetermined value.

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patent: 1174778 (1969-12-01), None
patent: WO 8403340 (1984-08-01), None

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