Patent ID: 7252624

Claim:
A regulating apparatus for a hydraulic cylinder of a treadmill comprising: a) a rotating knob with an opening formed on a top portion thereof and with a neck formed at a bottom end thereof, the periphery of the neck being marked with a plurality of numbers or with colors from light to dark; and b) an annular base having a ring-shaped gap for dividing the annular base into an internal side and an external side, the external side having a viewing window extending to the ring-shaped gap, a glass being received within the viewing window, the internal side of the annular base can be fixed on a top end of a hydraulic cylinder, the hydraulic cylinder having an adjusting post that projects through the opening of the rotating knob while the neck of the rotating knob is inserted into the ring-shaped gap; whereby the numbers or the colors disposed on the neck are visible from the viewing window when the adjusting post is rotated with the rotating knob for adjusting the hydraulic cylinder's cushioning force.