US Patent 7721617 Heat-treated rack bar
Patent 7721617 was granted and assigned to JTEKT on May, 2010 by the United States Patent and Trademark Office.
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Patent abstract
A method of heat-treating a rack bar includes a step of continuously conveying a rack bar provided with a rack teeth portion and a ball screw portion by a quenching means, and a step of sequentially applying a quenching treatment to each circumferential surface of the rack teeth portion and the ball screw portion. The quenching treatment is preferably and sequentially applied to each entire circumferential surface of the rack teeth portion and the ball screw portion.
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Patent Inventor Names
Kenichi Fukumura0
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US Patent 07721617 Heat-treated rack bar US Patent 7721617 Heat-treated rack bar
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Patent Number
077216170
Patent Number
77216170
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Official Website
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Is a
Current Assignee
Patent Jurisdiction
Patent Number
077216170
Date of Patent
May 25, 2010
0Patent Application Number
104554300
Date Filed
June 6, 2003
0Official Website
Patent Primary Examiner
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US Patent 07721617 Heat-treated rack bar
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07721617
Date of patent
May 25, 2010
Patent application number
10455430
Date Filed
June 6, 2003
Patent primary examiner
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