A valve mechanism for an intake valve has a cam block including a first cam and a second cam. Each of the first and second cams has a common base circle. A first rocker arm engaging with the first cam and a second rocker arm engaging with the second cam are provided. The arms have holes in which three...http://www.google.fr/patents/US4768475?utm_source=gb-gplus-shareBrevet US4768475 - Valve mechanism for an automotive engine
