Patent ID: 7901334

Claim:
An adjustable resistance assembly of an exercise apparatus, the exercise apparatus comprising a frame, at least one exercising member operably connected to the frame, and a rotating member pivotally connected to the frame and driven by the exercising member, the adjustable resistance assembly comprising: (a) a control mechanism operably connected to the frame, the control mechanism having a screw portion, an operating portion and a pushing portion, the operating portion connected to one end of the screw portion, the pushing portion extended from the other end of the screw portion, wherein the operating portion allows the user to rotate in one direction to drive the screw portion to move toward the rotating member; (b) an elastic member including a first portion having a first distal end connected to the frame, a second portion having a second distal end coupled to the pushing portion of the control mechanism, and a coiled third portion located between the first and second portions, the pushing portion of the control mechanism pushing the second distal end of the second portion of the elastic member a first distance and moving the third portion of the elastic member a second distance toward the rotating member wherein the ratio of the first distance to the second distance is not proportional to the ratio of a third linear distance defined by the second distal end of the second portion and the first distal end of the first potion of the elastic member to a fourth linear distance defined by the third portion and the first distal end of the first portion of the elastic member wherein the elastic member is a torsion spring; and (c) a resistance member pivotally connected to the third portion of the elastic member, the resistance member having a friction surface faced to the rotating member, as the elastic member moved, the friction surface of the resistance member exerted friction resistance on the rotating member.