Patent ID: 7141746

Claim:
A device for determining the weight at each axle of a spring ride tractor-trailer, the tractor-trailer including a cargo compartment mounted on a frame rail, the frame rail mounted on a suspension system having a spring rate, the suspension system attached to one or more axles and including one or more springs, each axle having opposed axle ends, and a wheel mounted at each axle end the device, comprising: two support members for each axle, each support member including a first elongate arm having opposed arm ends, an axle clamp member attached on one arm end and a support plate on the other end of the arm; the axle clamp member of each support member fixed to a one end of an axle proximate one wheel so that the support plate is proximate and under a frame rail; a distance indicator, the distance indicator comprising a body having a base, a probe extending upwardly from the body and a display gauge, the display gauge indicating the position of the probe above the body, the distance indicator positionable on the support plate of each support member so that the probe engages the frame rail to determine the distance between each plate and the rail; wherein the total weight at each axle is determined using the measured distances and the spring rate for the suspension system.