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:
Aug. 07, 2012
Filed:
May. 28, 2008
Shogo Nakata, Kyoto, JP;
Tadashi Hanai, Yao, JP;
Kouji Fujita, Yao, JP;
Masahiko Umekawa, Yao, JP;
Hiroshi Uchida, Yao, JP;
Shogo Nakata, Kyoto, JP;
Tadashi Hanai, Yao, JP;
Kouji Fujita, Yao, JP;
Masahiko Umekawa, Yao, JP;
Hiroshi Uchida, Yao, JP;
Hosiden Corporation, Yao-shi, JP;
Kyoto Tool Co., Ltd., Kyoto-shi, JP;
Abstract
A torque wrench having ease of operation compatible with improved accuracy of measurement. The torque wrench includes a tightening portion, a housing having a front side cover part and a back side grip part and a shaft-like strain body that is contained inside the housing. First distortion sensors and second distortion sensors are arranged on the strain body at spaced points in the axial direction of the strain body for measuring an amount of distortion of the strain body. A microprocessor chip has functions including computation of a tightening torque which is corrected for errors due to changes in a point of effort where a tightening force is applied by a user. The correction is based on the detection result of the first distortion sensors and the second distortion sensors. An output portion outputs the corrected tightening torque measurement value.