Patent ID: 8827592

Claim:
A machine comprising: a chassis; a push-roller assembly connected to the chassis, the push-roller assembly adapted to engage a vehicle, the push-roller assembly comprising: a support frame that is linearly displaceable relative to the chassis; at least one roller connected to the support frame, wherein the at least one roller is adapted to engage the vehicle; at least one support arm including a chassis end and a linkage end, the linkage end pivotally connected to the support frame and the chassis end pivotally connected to the chassis such that the support frame is movable relative to the chassis when the support arm pivots with respect to the chassis and the support frame; and an actuator connected to the support arm, the actuator adapted to cause the support arm to pivot with respect to the chassis and support frame such that the support frame is linearly displaceable relative to the chassis in response to command signals from an electronic control module; and a location sensor providing a location signal indicative of a linear distance between the chassis and the vehicle; wherein the electronic control module is configured to determine the command signals based on the location signal and send the command signals to the actuator to set the linear distance between the chassis and the vehicle such that a desired linear distance between the chassis and the vehicle is maintained continuously during operation of the machine.