Patent ID: 6948468

Claim:
A rockerless desmodromic valve and adjustable overhead cam system adapted to be installed onto a head for an internal combustion engine which utilizes at least one poppet valve for each intake and exhaust port, said system comprising: a plurality of valves having a retaining sphere disposed on a distal tip of a stem of each valve; a camshaft adapted to be transversely positioned within a plurality of bearing journals transversely positioned and spaced along a longitudinal length of the head; a split cam lobe assembly assigned to each valve comprising, a left cam lobe having an exterior side, interior side, a camshaft receiving hole oriented transversely through said left cam lobe adapted to slidably receive said camshaft, and a leftside cam following groove halve disposed on said interior side, and a right cam lobe having an exterior side, interior side, a camshaft receiving hole oriented transversely through said right cam lobe adapted to slidably receive said camshaft, and a rightside cam following groove halve disposed on said interior side; wherein said interior sides of said left and right cam lobe are adapted to be interfaced together to form a following groove having a generally spherical cross-sectional shape adapted to slidably receive said retaining sphere from a respective one of said valves.