Abstract: An adjustable pedal drive mechanism for bicycles and exercise machines includes a pedal arm attachment plate assembly on each side of the cycle or machine frame. Each plate assembly provides adjustment of the pivotally attached pedal arm, for altering its arcuate travel path and limits. Each pedal arm and plate includes a mechanism for infinitesimally adjusting the corresponding tension member (cable, chain, etc.) to predetermined positional limits, for altering the system's mechanical advantage. The mechanical ratios of each pedal arm are independently adjustable by handlebar controls. The tension member is reciprocated back and forth with corresponding strokes of the corresponding pedal arm, producing rotary force to the rear wheel with each pedal stroke. The rear wheel sprockets/pulleys drive one way mechanisms (ratchets, cam and roller, etc.) on the rear wheel hub. A stationary stand may be provided for a bicycle incorporating the mechanism, for use as an exercise machine.

Abstract: An adjustable pedal drive mechanism for bicycles and exercise, machines includes a pedal arm attachment plate assembly on each side of the frame of the cycle or machine. Each plate assembly provides adjustment of the pivotally attached pedal arm, to alter its arcuate travel path and limits as desired. Each pedal arm includes a mechanism providing infinitesimal adjustment of the attachment point of the corresponding tension member (cable, chain, etc.) thereto, to its predetermined limits, for altering the mechanical advantage of the system. Each plate assembly also includes a mechanism for infinitesimally adjusting the effective mechanical ratio of the device to its predetermined limits, as desired. The mechanical ratios of each pedal arm are independently adjustable as desired, by remote cable controls on the handlebars of the bicycle.

Abstract: The present invention is directed to a reciprocating piston, multi-cylinder internal combustion engine. The piston rods impinge on a nutating disc. The nutating disc is constrained in its movements in part by a constant-velocity (C.V.) joint. Movement of the C.V. joint along the longitudinal axis of the main engine shaft allows continuous variation of the engine compression ratio. Variation of the amount of wobble of the nutating disc allows the continuous variation of the engines displacement. In addition the engine can be provided with means for varying the valve lift and timing. The engine parameters may be varied in response to a variety of sensor inputs to ensure optimum engine performance under a wide variety of load conditions.