US Patent 10207144 Supporting apparatus for treadmill

A supporting apparatus used in a treadmill positioned on a supporting surface and including a base frame, a treadbase pivotally connected to the base frame and biasable between a reclined position and an upright position and a linkage pivotally coupled between the treadbase and the base frame. The base frame includes a supporting shaft inserted through the base frame and slidably supportable on the supporting surface and defining opposing first and second supporting sections that are respectively extended out of two opposite lateral sides of the base frame in such a manner that a length of the first supporting section is greater than a length of the second supporting section when the treadbase is in the reclined position, or smaller than the length of the second supporting section when the treadbase is in the upright position.