Cam drive system for engine

Claim 1

An overhead camshaft internal combustion engine comprised of a cylinder block defining a plurality of cylinder bores, a cylinder head assembly affixed to said cylinder block and closing one end of said cylinder bores to form a plurality of combustion chambers therein along with pistons reciprocating in said cylinder block, said cylinder head assembly comprising a plurality of poppet type valves each associate with respective of said combustion chambers, a cam shaft journalled in said cylinder head for operating said poppet type valves, a crankshaft rotatably journalled relative to said cylinder block at the end of said cylinder bores opposite said cylinder head and driven by said piston, said cylinder head assembly including at least one detachable member at one side thereof providing at least in part a journal for journalling an intermediate shaft for rotation about an axis parallel to the axes of rotation of said crankshaft and said camshaft, a first flexible transmitter for driving said intermediate shaft from said crankshaft at a point spaced inwardly from one end of said cylinder block and between two of said cylinder bores, and a second flexible transmitter for driving said camshaft from said intermediate shaft.