Valve actuation means

Claim 1

IN AN INTERNAL COMBUSTION ENGINGE HAVING A CYLINDER AND A VALVE OPENING INTO SAID CYLINDER, MEANS FOR ACTUATING SAID VALVE COMPRISING: A CAMSHAFT MOUNTED IN SAID ENGINE AND HAVING A PAIR OF INTEGRAL CAMS FORMED THEREON, SAID CAMS BEING AXIALLY SPACED AND HAVING CAM SURFACESS INCLINED TOWARDS EACH OTHER; A PAIR OF CAM RINGS SECURED TO SAID CAMSHAFT AND ROTATABLE THEREWITH AND SURROUNDING SAID INTEGRAL CAMS, SAID CAM RINGS AND SAID INTEGRAL CAMS FORMING ECCENTRIC GROOVES ABOUT SAID CAMSHAFT; A ROCKER ARM PIVOTALLY MOUNTED AT ONE END TO SAID ENGINE AND SECURED AT THE OTHER END TO SAID VALVE; CAM FOLLOWERS SECURED TO SAID ROCKER ARM AND RECEIVED IN SAID ECCENTRIC GROOVES; SPRING MEANS BIASING SAID CAM RINGS INTO ENGAGEMENT WITH SAID CAM FOLLOWERS TO INSURE POSITIVE ENGAGEMENT BETWEEN SAID CAMS AND SAID FOLLOWERS; AND MEANS FOR ROTATING SAID CAMSHAFT TO OSCILLATE SAID ROCKER ARM THROUGH SAID CAM FOLLOWERS AND SAID ECCENTRIC GROOVES FOR ACTUATING SAID VALVE IN SAID CYLINDER.