Hydraulic servocontroller for a hydrostatic transmission

Details Hydraulic servocontroller for a hydrostatic transmission Hydraulic servocontroller for a hydrostatic transmission

1978-01-13

1980-02-19

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

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

60488, 60494, F16H 3946

Patent

active

041887891

ABSTRACT:
A hydrostatic transmission having a variable displacement pump whose control element varies the transmission ratio and output direction of the transmission is controlled by a hydraulic servomechanism including a direction-reversing valve and a cylinder connected to this valve. A direction selector acts upon the valve and a mechanical or hydraulic locking mechanism is provided to prevent shifting of the valve until the control element of the pump has been restored to its neutral position before direction change.

REFERENCES:
patent: 2381795 (1945-08-01), Willett
patent: 4075841 (1978-02-01), Hamma et al.

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