Patent ID: 7645216

Claim:
A resistance exercise device for exercising a muscle or muscle group, the device comprising a frame; a primary cam supported by and fixed to the frame in a non-rotatable manner, the primary cam having a circumference; a secondary cam supported by a at least one connecting arm; the at least one arm comprising a first end pivotally connected to the primary cam via the axis, and a second end pivotally connected to the secondary cam via the axis; a cam connection between the primary cam and the secondary cam for rotating such the secondary cam around at least a portion of the circumference of the primary cam when the secondary cam is rotated; wherein the cam connection further comprises: a first cam connection would clockwise on the primary cam and wound counterclockwise on the secondary cam, and a second cam connection wound counterclockwise on the primary cam and wound clockwise on the secondary cam; wherein the primary cam and the secondary cam are interlocked by the cam connection such that any rotation of the secondary cam will cause it to rotate around the primary cam; a contact cam, plate, lever, arm, etc. fixed rigidly to the axis of the secondary cam; a resistance line attached such that when the secondary cam is rotated the resistance line is engaged to tension; a form of resistance attached such that when the resistance line is engaged it will move the form of resistance.