Patent ID: 7694659
Filing Date: 2010-04-13
Classification: F01L,Y10T

Abstract:
1. A rocker arm formed of a sheet material, comprising: a pair of side wall portions opposed to each other; a connection portion for a valve stem receiving portion, which interconnects a plurality of inner side surfaces of the pair of side wall portions at one end thereof in a longitudinal direction; a connection portion for a pivot receiving portion, which interconnects the inner side surfaces of the pair of side wall portions at the other end thereof in the longitudinal direction; and an open portion for arranging a roller, which is formed between the connection portion for the valve stem receiving portion and the connection portion for the pivot receiving portion, wherein a distance between a plurality of outer side surfaces of the pair of side wall portions in the connection portion for the valve stem receiving portion is reduced in a step shape or in a taper shape comprising two or more step differences.