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:
Sep. 29, 2009
Filed:
Apr. 11, 2007
Applicant:
Toshihiko Kushida, Osaka, JP;
Inventor:
Toshihiko Kushida, Osaka, JP;
Assignee:
Maeda Metal Industries, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B25B 21/00 (2006.01); B25B 23/151 (2006.01);
U.S. Cl.
CPC ...
Abstract
An abrupt fall in a current value immediately after an abrupt rise at the time when an starting switch is turned ON is detected, when the current value rises due to starting of nut fastening and then the current value abruptly falls, it is determined that an inward flange of a washer is sheared, and when the current value reaches a value corresponding to a primary fastening torque, the motor is stopped.