Patent ID: 9328815
Filing Date: 2016-05-03
CPC Classification: B21J,B21K,B62D,F16H,Y10T

Claim Text:
1. A rack bar configured to mesh with a pinion gear, the rack bar comprising a hollow shaft portion, a rack toothed portion provided on the hollow shaft portion, and a dummy toothed portion, wherein the rack toothed portion comprises a plurality of rack teeth configured to mesh with the pinion gear, wherein the rack teeth are provided side by side in an axial direction of the shaft portion, each of the rack teeth comprising a contact face arranged obliquely relative to the axial direction to contact the pinion gear, wherein the dummy toothed portion comprises at least one dummy tooth provided on at least one side of the rack toothed portion in the axial direction such that the dummy tooth is arranged parallel to and next to the rack teeth, wherein the dummy tooth is designed such that a whole height of the dummy tooth is smaller than a whole height of each of the rack teeth, and wherein cross-sectional shapes of an interior surface of the hollow shaft portion corresponding with a location of the rack teeth and the at least one dummy tooth on an exterior of the hollow shaft portion are even along the axial direction.