US Patent 10500436 Linkage assemblies for exercise devices

An exercise device includes a linkage assembly that links a driving member to a driven member such that circular rotation of the driving member causes generally equal circular rotation of the driven member. The linkage assembly includes a linking member, a first crank arm that connects the driving member to the linking member such that rotation of the driving member causes motion of the linking member, and a second crank arm that connects the linking member to the driven member such that the motion of the linking member causes rotation of the driven member. At least one additional crank arm connects the linking member at a rotational axis that is laterally offset from a straight line through the first and second crank arm rotational axes.