Patent ID: 7077788

Claim:
A cushion device for treadmills, comprising: a frame having two longitudinal rails and two upper pulleys and two lower pulleys respectively connected to two respective insides of first ends of the two rails of the frame; a deck having two pairs of holes defined through two sides of a first end of the deck and a second end of the deck pivotably connected to two respective second ends of the two rails of the frame; two tubes are connected to the two rails of the frame and two activation rods axially extending in the two tubes, each of the two activation rods having a nut member threadedly connected to a threaded section thereof, two slide members slidably mounted to the two activation rods, two springs mounted to the two activation rods and biased between the nut member and the slide member, two bars radially extending through each of the two tubes and each activation rod in each tube including a groove defined in a plain section thereof so that the activation rod spins in the tube, and two cables having two respective first ends fixed to the slide members and two respectively second ends extending through each tube, reeving through the lower pulley and the upper pulley and fixed to the first end of the deck.