Patent ID: 7722507

Claim:
An inclination controlling device for a treadmill comprising: a belt support frame having a front part and a rear part; a first link member pivotally connected to said belt support frame at said front part of said belt support frame, so as to enable relative rotation therebetween; a first pivotal joint connecting said first link member with said belt support frame, said first pivotal support joint being configured to move in accordance with the relative rotation between said first link member and said belt support frame; a second link member pivotally connected to said belt support frame at said rear part of said belt support frame, so as to enable relative rotation therebetween; a second pivotal joint connecting said second link and said belt support frame, said second pivotal joint being configured to move in accordance with the relative rotation between said second link member and said belt support frame; and a base frame pivotally connected to both said first link member and said second link member, said base frame and said first link forming a rear angle therebetween, wherein the length of said second link member is shorter than the length of said first link member, and wherein the rear angle between said first link member and said base frame is less than 90 degrees.