Patent ID: 9488074
Filing Date: 2016-11-08
CPC Classification: F01L

Claim Text:
1. A desmodromic valve system for an internal combustion engine having a plurality of valves with valve stems operatively connected to a camshaft in a cylinder head providing open space on opposite sides of the camshaft adjacent each of a plurality of cams, said system comprising: a slightly flexible semirigid basket disposed about said camshaft, said slightly flexible semirigid basket secured to a first valve stem by an integral retainer on a bottom portion thereof and constrained to motion along the valve stem axis, said basket having a pair of downwardly oriented cam followers in the upper portion thereof, spaced apart from the valve stem axis; and a central cam and a parallel pair of side cams fixedly mounted on said camshaft so as to rotate therewith, said cams substantially surrounded by said basket circumferentially and cooperating therewith to provide reciprocating valve action with positive bidirectional drive, said central cam aligned with the valve stem axis, said side cams spaced apart from the valve stem axis, parallel to said central cam and respectively aligned with said cam followers, said central cam pushing said valve stem down so as to positively open the associated valve during a first part of a valve cycle, said valve stem pulling said basket down with it via said retainer, said side cams pushing said basket up via their respective cam followers and thereby causing said basket to pull said valve stem so as to positively close the valve during a second part of the valve cycle.