Patent ID: 8074619

Claim:
An engine comprising: a first assembly including a first piston reciprocally disposed in a first cylinder where valves; a second assembly including a second piston reciprocally disposed in a second cylinder, the second assembly being adapted for a synchronous movement with the first assembly such that said first piston moves in cooperation with said second piston; and third and fourth assemblies which are mutually adapted for a synchronous movement with one another, the third assembly including a third piston moving in cooperation with a fourth piston of the fourth assembly; wherein a power stroke of said first piston effects an exhaust stroke of said second piston; and a power stroke of said second piston effects an exhaust stroke of said first piston, wherein the first, second, third, and fourth assemblies are adapted for cooperation with a gear unit to convert a translational movement into a rotary movement, wherein a first outlet valve of the first cylinder is interconnected with a third inlet valve of the third cylinder, and a second outlet valve of the second cylinder is interconnected with a fourth inlet valve of the fourth cylinder; the third and the fourth cylinders are provided with outlet valves for removing exhaust gases; and wherein the gear unit includes an engine shaft and means for reversing a rotation of the engine shaft by moving the engine shaft in a lateral direction.