4-wheel coordinated steering multi-purpose tractor

Motor vehicles – Having four wheels driven – With means for steering all driven wheels


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56DIG22, 180236, 180242, 280 91, 280 99, 280104, A01D 3526, B60G 1108, B62D 506, B62D 716




A 4-wheel mobile vehicle including provision for controlling the steering position of each of the four (4) wheels so that every wheel's rolling axis will intersect at a common central point around which the vehicle will turn. The control is provided by a pair of cables which can interconnect each of the pair of wheels on each side of the vehicle to turn through similar turns in the opposite direction, and wherein the linear position of the cables are provided by a pair of specially cut cams which are positioned by the steering column. Each pair of wheels is further characterized by a support system which provides for vertical deviation of the front and back wheels without substantially causing the vehicle carriage itself to be vertically deviated by a substantial amount.

patent: 1126111 (1915-01-01), Smith
patent: 3504928 (1970-04-01), Reimer
patent: 3596730 (1971-08-01), Cecce
patent: 4557346 (1985-12-01), Guignard et al.
patent: 4749206 (1988-06-01), Delery et al.


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