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. 20, 2010
Filed:
Oct. 25, 2007
Yasunobu Kaneyama, Osaka, JP;
Tatsuo Hirai, Osaka, JP;
Yasunobu Kaneyama, Osaka, JP;
Tatsuo Hirai, Osaka, JP;
Maeda Metal Industries, Ltd., Osaka, JP;
Abstract
A bolt or nut tightening device has an outer shaft and an inner shaft rotatable in directions opposite to each other, the outer shaft having a reaction receiver projecting therefrom sideways, the inner shaft being provided with an engaging portion engageable with a bolt or nut to be tightened, the bolt or nut tightening device being provided on the outer shaft with a tightening torque measuring unit, which comprises a strain sensor, a circuit board, an indicator, a battery, and a case for accommodating the circuit board, the indicator and the battery, the case being attached to the outer shaft, projecting toward the same direction as the reaction receiver, and being so sized as to be hidden by a contour of the reaction receiver and so positioned as to be hidden behind the reaction receiver when seen from the forward end side of the engaging portion.