Patent ID: 9254865
Filing Date: 2016-02-09
CPC Classification: B60W,B62D

Claim Text:
1. A vehicle comprising: a chassis; a left front steerable, non-driving wheel coupled to the chassis and capable of turning more than 90 degrees left; a right front steerable, non-driving wheel coupled to the chassis and capable of turning more than 90 degrees right; left and right rear drivable wheels coupled to left and right hydrostatic drive units; a first gear pair that turns the right front steerable, non-driving wheel, the first gear pair comprising: a second gear pair that turns the left front steerable, non-driving wheel, the second gear pair comprising: a steering wheel that can receive a steering input from an operator of the vehicle; a speed pedal that can receive a speed input from an operator of the vehicle; first and second speed cams oriented parallel to each other and coupled to the speed pedal, the first speed cam including a first curved slot and the second speed cam including a second curved slot, the first and second curved slots having the same shape, where movement of the speed pedal causes the first and second speed cams to rotate in the same direction and by the same amount about an axis extending through each of the first and second curved slots; a first follower that rides in the first curved slot and that will move in response to steering wheel movement to a right-hand turn from a straight-ahead position; and a second follower that rides in the second curved slot and that will move in response to steering wheel movement to a left-hand turn from a straight-ahead position; where the left and right hydrostatic drive units are capable of driving the left and right rear drivable wheels at different speeds and in different directions; movement of the steering wheel without a speed input from the speed pedal does not cause rotation of the left and right rear drivable wheels; and the same one of the left and right rear drivable wheels will rotate faster than the other of the left and right rear drivable wheels in both forward and reverse for a turned position of the steering wheel.