Stair step exercise machine

Abstract

A stair step exerciser is mounted on a frame having horizontal and vertical components. A carriage comprised of a pair of side plates is pivoted to one end of a horizontal component and is retained at the other end in one of a series of vertical stops to selectively determine the angle of the carriage with respect to the frame. The carriage has pulleys at both ends which support the belts on which treads are pivoted at one end. The other end of the treads rest on one rail of a four bar linkage, which linkage expands as the carriage angle is decreased and collapses as the carriage angle is increased so as to always maintain the treads horizontal. A pair of hand cables are provided which move at substantially the same speed as the treads. The hand cables are mounted so as to be closer to the treads as the angle of the carriage increases and so as to move away from the treads as the angle of the carriage decreases.

Dependencies are inferred from the claim text.