Method of making a component part of a reclining device
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United States of America Patent
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Mar 10, 2009
Grant Date -
Jun 28, 2007
app pub date -
Jul 27, 2006
filing date -
Dec 26, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In making a component part of a reclining device that is used to adjust an inclination of a seat back with respect to a seat cushion, after the component part has been prepared, a predetermined portion of the component part is selectively heated up to a temperature greater than a transformation point of a material of the component part, and the component part is then cooled. During this heat treatment, portions of the component part other than the predetermined portion are left as a base material to thereby selectively increase the strength or the wear and abrasion resistance of the component part.
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