Patent ID: 7494449

Claim:
An exercise apparatus comprising: a frame, said frame configured to support an adjustable drive; an adjustable drive having: a pair of crank arms, each said crank arm configured to rotate about a pivot axis positioned upon said frame; a pair of adjustment arms, each said adjustment arm configured to rotate about said pivot axis: a pair of crank links, each said crank link pivotally coupled to a respective said crank arm; a pair of adjustment links attached to an adjustable shaft, each said adjustment link pivotally coupled at one end thereof to a respective said crank link and pivotally coupled at the other end thereof to a respective said adjustment arm; a jackshaft, said jackshaft configured to rotate relative to said frame; a belt assembly, said belt assembly engaging said adjustment arms via said adjustment shaft and said jackshaft a pair of drive pivots, each said drive pivot positioned upon a respective said crank link at a predetermined distance relative to said pivot axis to receive operator force; said operator force causing said crank arms to rotate relative to said frame whereby said predetermined distance may be changed for operation of said exercise apparatus by said adjustment arm.