Exercise treadmills with stationary, forwardly placed supporting surface engaging foot means of fixed form and with rearwardly placed supporting surface engaging support means which are movable relative to the frame of the treadmill to change the angular relation of the frame and the treadmill tread...http://www.google.com/patents/US5518471?utm_source=gb-gplus-sharePatent US5518471 - Exercise treadmill with rearwardly placed incline mechanism
Exercise treadmill with rearwardly placed incline mechanism
