Rack bar and rack bar teeth forming die
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United States of America Patent
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May 3, 2016
Grant Date -
Dec 26, 2013
app pub date -
Jun 20, 2013
filing date -
Jun 21, 2012
priority date (Note) -
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Abstract
A rack bar includes a shaft portion, a rack toothed portion provided on the shaft portion, and a dummy toothed portion. The rack toothed portion includes a plurality of rack teeth provided side by side in an axial direction of the shaft portion, each of the rack teeth including a contact face arranged obliquely relative to the axial direction to contact the pinion gear. The dummy toothed portion includes 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. 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.
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