Crawler track transmission system

Motor vehicles – Steering by driving – Endless flexible track

Patent

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Details

192 13A, B62D 1108

Patent

active

044795637

ABSTRACT:
A transmission control system is provided for enhancing the braking of a crawler-type tractor by controlling the engagement and disengagement of the clutches associated with a right-hand and left-hand crawler tracks in response to the actuation of the brakes associated with the tracks. The arrangement includes pressure sensor means operatively associated with the hydraulic brake system of the right-hand and left-hand crawler tracks of a crawler-type tractor. The system functions such that actuation of both the right-hand and left-hand track brakes simultaneously prevents the normal disengagement of the track clutches which permits the engine of the tractor to assist in braking. Actuation of a single brake pedal allows braking of that respective crawler track with disengagement of its respective clutch, while allowing the clutch of the opposite track to remain engaged to effect pivot turning of the tractor.

REFERENCES:
patent: 3068976 (1962-12-01), Kelly
patent: 3494449 (1970-02-01), Umeda et al.
patent: 3498427 (1970-03-01), Bingley
patent: 3895703 (1975-07-01), Schmitt et al.
patent: 3899058 (1975-08-01), Pasquini
patent: 4076107 (1978-02-01), Yasoshima
patent: 4088209 (1978-05-01), Drone
patent: 4116291 (1978-09-01), Brungart

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