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. 02, 2008
Filed:
May. 11, 2005
Yoshinori Sainomoto, Sanda, JP;
Tatsuhiko Matsumoto, Habikino, JP;
Tadashi Arimura, Kyoto, JP;
Toshiharu Ohashi, Sakata-gun, JP;
Hidenori Shimizu, Hikone, JP;
Fumiaki Sawano, Hikone, JP;
Yoshinori Sainomoto, Sanda, JP;
Tatsuhiko Matsumoto, Habikino, JP;
Tadashi Arimura, Kyoto, JP;
Toshiharu Ohashi, Sakata-gun, JP;
Hidenori Shimizu, Hikone, JP;
Fumiaki Sawano, Hikone, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A rotary impact tool can be used in a work especially precision or finishing of fastening is important. The rotary impact tool comprises a rotary driving mechanism including a driving source for rotating a driving shaft, a hammer fixed on the driving shaft, an output shaft to which a driving force is applied by impact blow of the hammer, a torque setting unit used for setting a fastening torque, a processor for calculating fastening torque from impact blow of the hammer, a rotation speed setting unit used for setting rotation speed of the driving shaft, and a controller for rotating the driving shaft of the rotary driving mechanism in a rotation speed set in the rotation speed setting unit and for stopping rotation of the driving shaft of the rotary driving mechanism when the fastening torque calculated in the processor becomes equal to or larger than a reference value of fastening torque previously set in the torque setting unit.