Patent ID: 8851031

Claim:
A differential stroke reciprocating internal combustion engine having an engine shaft and a piston configured to reciprocate within a cylinder chamber comprising: an inner piston part; a piston stem coupled at a first end to said inner piston part; an outer piston part which serves as a carrier for said inner piston part and is connected to said engine shaft, wherein said inner piston part is configured to operate on a cycle different from that of said outer piston part; a control and linkage assembly coupled to said engine at an anchor point, said control and linkage assembly pivotally coupled at a second end of said piston stein defining a copy point, wherein said control and linkage assembly guides and defines the movement of said copy point to be substantially aligned with an axis of said cylinder chamber; and a guide element movable within a guide apparatus defined within said engine and coupled with said control and linkage assembly at a location defining an origin point, wherein said guide element guides said copy point to move linearly lengthwise along a cylinder axis.