Friction reducing rocker arm construction

Abstract

A rocker arm is constructed with a fulcrum having at least a partially cylindrical bearing surface and a central passage for receiving therein a pressurized supply or lubricant or oil, the passage being intersected by radial holes or passages connected to the periphery or outer bearing surface of the fulcrum to define a clearance space between the fulcrum and rocker arm surrounding it, for the introduction of a film of oil or lubricant during the non-loading cycle of operation of the cam, a squeeze film effect being provided during the loading operation of the cam by the oil or lubricant being evacuated through a lower or ambient pressure outlet, a thin film remaining to floatingly mount the rocker arm upon the fulcrum, this being accomplished by the introduction of the oil or lubricant under a pressure greater than the forces generated when the cam is in contact on the cam base circle.