Patent ID: 6109226
Filing Date: 2000-08-29
Classification: F01L

Abstract:
A valve operating mechanism in an overhead cam internal combustion reciprocating piston engine which eliminates the use of a valve spring comprising:a) a valve;b) a pair of geared rockers for each valve whose gears are mutually engaged, wherein the movement of said geared rockers is interdependent and wherein each of said rockers reciprocate on a respective shaft so as to control an opening and closing operational cycle of said valve;c) a retaining mechanism located at an end of one of said geared rockers which engages at the top end of said valve stem to provide a means of connectivity between said geared rockers and said valve throughout the operational cycle;d) a cam shaft located in the cylinder head area next to said pair of geared rockers which incorporates two different cam lobes per valve, wherein one lobe provides the energy required for valve closing, and the other lobe provides the energy required for valve opening.