Patent ID: 7146948

Claim:
A valve actuating assembly interconnected to a cam mounted on a camshaft for raising and lowering a valve to close and open a port of a cylinder during the cycles of an internal combustion engine, comprising: a plurality of rotary cam guides mounted on the camshaft of the internal combustion engine with the rotary cam guides arranged in pairs along the camshaft and each cam guide having an inwardly disposed roller channel defining an outer surface with the roller channels of each cam guide facing each other; a reciprocating lifter interconnected to the valve and having a lower end that extends between the cam guides; a radius located at the lower end of the lifter for selective contact with the cam during the engine cycles; a rotatable roller mounted at the lower end of the lifter and having opposed roller ends that are received within the respective roller channels for selective interaction with the outer surfaces during certain engine cycles; a connecting rod having a lower connecting rod end adjustably securable to the lifter and an opposite upper connecting rod end; a rocker arm pivotally connected to the upper end of the connecting rod and having a tapered end; the valve having a valve stem extension interconnected to the tapered end of the rocking arm; a medium duty valve spring mounted on the valve stem extension and extensible and compressible thereon concomitant with the reciprocation of the lifter and the pivotal motion of the rocking arm during the engine cycles for raising and lowering the valve to open and close the port; and whereupon the rotation of the camshaft causes the cam to contact the radius and the roller ends to contact the outer races of the roller channels during the engine cycles thereby causing the reciprocating motion of the lifter to be transferred through the connecting to the rocker arm so that the valve can be opened and closed with positive force applied by the valve spring and the contact between the cam and the radius and the roller ends and the outer races shifting between each other so that the valve is opened, and then held opened, closed and held closed concomitant with the engine going through the various engine cycles.