Patent ID: 6953014

Claim:
A thermal compensating desmodromic valve actuation system for opening and closing at least one valve of an engine, said system comprising: a cam assemblage, said cam assemblage including a cam mechanism for rotational movement; a driving mechanism for reciprocal movement operably connected to said cam mechanism; said driving mechanism also being operably connected to the at least one valve of the engine to move the at least one valve between a valve closed position and a valve open position and between said open position and said closed position in a manner directly related to said rotational movement of said cam mechanism; means operably connected to said driving mechanism for adjustably controlling the movement of the at least one valve in order to provide a variable amount of opening of the at least one valve in said open position; said adjustably controlling means further comprises an adjustable rotatable disk operably connected to said driving mechanism; said adjustable rotatable disk having an elongated slot therein, said elongated slot having a predetermined length which effects a maximum amount of opening of the at least one valve said elongated slot being disposed at an adjustable angle with respect to the center of the rotatable disk, said angle effecting the variable amount of said open position of the at least one valve; and a valve stem thermal compensator disposed in said elongated slot, said valve stem thermal compensator having a pair of distally opposed spring-like projections to maintain a pre-load therebetween, whereby, the at least one valve being moved between said closed position and said open position and between said open position and said closed position without the intervention of any spring action.