Patent ID: 7000581

Claim:
A 4-stroke monoshaft multi-valve internal combustion engine comprising: a first cam follower assembly configured to operate an intake valve of the engine, a second cam follower assembly configured to operate an exhaust valve of the engine, a cam follower channel assembly comprising a base circle channel circumferentially cut in a crank web attached to a crank shaft of the engine, a cam channel circumferentially cut substantially parallel to the base circle channel, a channel crossover cut to provide channel interconnectivity between the base circle channel and the cam channel, wherein when the first cam follower assembly is slideably engaged to the cam channel the intake valve is operated during a first-half rotation of the crank web, and wherein when the second cam follower assembly is slideably engaged to the cam channel the exhaust valve is activated during a second-half rotation of the crank web, first and second L-shaped follower arms of the first and second cam follower assemblies respectively pivotally mounted to a single free standing pivot pin that is parallel to a crank axis of the crank web, first and second transverse follower arms pivotally mounted at first and second distal ends of the first and second L-shaped follower arms, first and second followers mounted on the first and second transverse follower arms respectively and disposed within the cam follower channel assembly, and the first and second L-shaped follower arms operatively connected by first and second push-tubes to the intake and exhaust valves respectively and to reciprocate and activate the intake and exhaust valves.