A cam roller pin for mounting a cam roller with a substantially uniform width to a rocker lever includes a substantially cylindrical pin body bounded by a pair of oppositely-disposed ends and having a length which extends from one end to the opposite end, the pin body defining an oblong trough...http://www.google.fr/patents/US5797364?utm_source=gb-gplus-shareBrevet US5797364 - Top trough cam roller pin
