Patent ID: 8789632

Claim:
A vehicle comprising: a frame; one or more front wheels proximate to a front end of the frame; one or more rear wheels proximate to a rear end of the frame; one or more middle wheels between the front end of the frame and the rear end of the frame; and a wheel-positioning system to adjust a height of the front wheels relative to a height of at least one of the one or more rear wheels and the one or more middle wheels, the wheel-positioning system comprising: one or more arms pivotally coupled to the frame; and an adjustment mechanism operatively coupled at or proximate to a rear end of the one or more arms, wherein the one or more front wheels are operatively coupled at or proximate to a a front end of the one or more arms and the one or more middle wheels are operatively coupled to the one or more arms at a position between the front end and the rear end of the one or more arms, and wherein the adjustment mechanism moves the one or more arms between a first position and a second position so that the one or more front wheels are in a first position when the one or more arms are in the first position and a second position when the one or more arms are in the second position.