Internal combustion engine valve gear

Claim 1

IN AN INTERNAL COMBUSTION ENGINE, A CYLINDER HEAD HAVING A PLURALITY OF COMBUSTION CHAMERS ARRANGED LONGITUDINALLY THEREOF, EACH CHAMBER HAVING INTAKE AND EXHAUST PORTS OPENING THEREIN, THE INTAKE PORTS BEING ALL ARRANGED ON ONE SIDE OF THE CYLINDER HEAD AND THE EXHAUST PORTS BEING ALL ARRANGED ON THE OTHER SIDE, INTAKE AND EXHAUST VALVES FOR CONTROLLING THE FLOW OF GAS THROUGH THE PORTS, THE AXES OF THE INTAKE VALVES BEING DIRECTED TOWARD THE LONGITUDINAL CENTER OF THE CHAMBER, EACH VALVE INCLUDING A STEM, A VALVE HEAD CARRIED BY THE STEM AND SEATED WITHIN THE CHAMBER SAID SPRING MEANS BIASING THE VALVE IN CLOSING DIRECTION, A SINGLE CAMSHAFT MOUNTED ON THE CYLINDER HEAD DIRECTLY OVER TH INLET VALVE STEMS AND HAVING LONGITUDINALLY SPACED INTAKE AND EXHAUST CAMS, INTAKE VALVE OPERATING MEANS COMPRISING TAPPETS RECIPROCABLE IN THE CYLINDER HEAD AND ENGAGING THE INTAKE CAMS ON ONE SIDE AND THE INTAKE VALVE STEMS ON THE OTHER, AND EXHAUST VALVE OPERATING MEANS LONGITUDINALLY SPACED BETWEEN THE INTAKE VALVE OPERATING MEANS AND EACH COMPRISING A ROCKER ARM, A ROCKER ARM SUPPORT INCLUDING A STUD HAVING ONE END SECURED TO THE CYLINDER HEAD AT A POINT LONGITUDINALLY ALIGNED WITH AN ADJACENT A CORRESPONDING INTAKE TAPPET AND AN ADJUSTABLE COLLAR SECURED ON THE STUD, THE END OF THE COLLAR ADJACENT THE CYLINDER HEAD FORMING A PARTSPHERICAL CENTRAL SEAT FOR THE ROCKER ARM, ONE END OF THE ROCKER ARM BEING ENGAGED WITH THE EXHAUST CAM AND THE OTHER END BEING ENGAGED WITH THE EXHAUST VALVE STEM, THE AXIS OF THE STUD, THE AXIS OF THE EXHAUST VALVE AND THE PRESSURE LINE OF THE ROCKER ARM AND EXHAUST VALVE CAM BEING LOCATED IN A COMMON PLANE EXTENDING TRANSVERSELY OF THE CYLINDER HEAD AND HAVING SUBSTANTIALLY A COMMON POINT OF INTERSECTION TO AVOID BENDING FORCES ON THE STUD.