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:
Nov. 17, 1998
Filed:
May. 22, 1997
Tadahiro Ohmi, Sendai, JP;
Eiji Ideta, Osaka, JP;
Hiroyuki Fukuda, Osaka, JP;
Keiji Hirao, Osaka, JP;
Tsutomu Shinohara, Osaka, JP;
Michio Yamaji, Osaka, JP;
Hiroshi Morokoshi, Osaka, JP;
Tetsuya Kojima, Osaka, JP;
Fujikin Incorporated, Osaka, JP;
Abstract
A method is provided for tightening up threaded members with proper tightening torque free of unequivalent tightening. In tightening a plurality of threaded members by drive means, the amount of tightening and tightening torque of each threaded member are detected as the members are progressively tightened, and when the tightening amount of each member has reached a value within a specified range, the difference in tightening torque between the threaded members is checked as to whether it is within a predetermined range.