A variable stroke assembly

• Main Author: O'DONNELL, RAYMOND SYDNEY
• Format: Patent
• Language: English
• Published: 30.05.2013
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENTTYPE, e.g. STEAM ENGINES; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

There is proposed a variable stroke assembly having a primary crank, the primary crank having a primary axis of rotation; a hypocycloid gear set having at least one internal gear and at least one spur gear, the internal gear having an axis of rotation that coincides with the primary axis of rotation of the primary crank and the spur gear having a secondary axis of rotation, wherein the primary crank cooperatively engages and rotates within the internal gear about the primary axis of rotation, the spur gear pivotally mounted on the primary crank such that the secondary axis of rotation is offset from the primary axis of rotation; a secondary crank having a third axis of rotation, wherein the secondary crank cooperatively engages the spur gear such that the third axis of rotation is further offset from the primary and secondary axis of rotation; a connecting rod, with a first and second end, the first end of connecting rod is pivotally connected to the secondary crank, wherein operation the connecting rod travels in a substantially linear motion that translates into rotational motion of the secondary crank, spur gear and primary crank.