The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2008
Filed:
Feb. 22, 2006
Tatsumi Makimae, Hiroshima, JP;
Yutaka Fujii, Hiroshima, JP;
Hiroshi Shinagawa, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
After it is tightened with a snug torque T, a bolt is tuned by a total turning angle θequivalent to the sum of an initial-set turning angle θand a corrective additional-turning angle (θ+θ). The corrective additional-turning angle (θ+θ) is the sum of a first corrective additional-turning angle θand a second corrective additional-turning angle θ, the first corrective additional-turning angle θbeing to compensate for a situation where a bolt turning angle θcorresponding to the snug torque θon an extension line of the bolt tightening torque properties Cin a late tightening stage II is different from a bolt turning angle θcorresponding to the actual snug torque T, the second corrective additional-turning angle θbeing to compensate for a decrease of an effective bolt axial force that is caused by an existence of the initial tightening stage I.