Patent ID: 8919774
Filing Date: 2014-12-30
Classification: G09B

Abstract:
1. A four bar drive link system comprising: a frame assembly, the frame assembly having a plurality of guide rails, including at least a proximal hinge adjustment rail, and a frame simulator rail; a proximal hinge attachment bracket connected to the proximal hinge adjustment rail; a bottom bracket simulator attached or otherwise connected to the frame simulator rail; a pair of crank levers, each being attached at a first end to an axle having an axis of rotation in the bottom bracket assembly; a pair of coupling levers each attached to an opposite second end of the crank lever wherein each coupling lever includes a post opening; a pair of pedal levers each having a post wherein each post of each pedal lever is pivotally attached to its respective post opening and to an axle having an axis of rotation in the proximal hinge attachment bracket; and wherein the relative dimensions between the axis of rotation of proximal hinge and axis of rotation of the bottom bracket are adjustable by movement along the proximal hinge guide rail or the frame simulator guide rail or a combination of both.