Actuator system for dual path transmission

Motor vehicles – Steering by driving – Independently operable drive motors

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Details

60486, 74471XY, 180 77H, B62D 1104

Patent

active

040858120

ABSTRACT:
An actuator system for a dual path transmission usable with a vehicle, such as a crawler tractor or the like, wherein a pair of hydrostatic transmission units each have at least one power unit with variable displacement means therefor responsive to a control pressure for setting displacement, a control console mountable on the vehicle has a plurality of control valves including a ratio valve for setting a control pressure to establish the direction and speed of travel of the vehicle by uniform speed of both transmission units, and steer valves which may modify the speed of at least one transmission unit for steering of the vehicle, and a control station including a manually operable control member remote from the control console with motion-transmitting linkages whereby movement of the control member in one path may cause adjustment of the ratio valve for establishing the speed and direction of travel of the vehicle either forward or reverse and with movement of the control lever along an intersecting path causing movement of one of the steer valves without effect on the ratio valve or the other steer valve for steering of the vehicle and with there being compound or universal movement capability for simultaneous control of both speed and steer functions.

REFERENCES:
patent: RE27488 (1972-09-01), Lauck
patent: 3180305 (1965-04-01), Gower-Rempel
patent: 3885388 (1975-05-01), Crull

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