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:
Apr. 18, 1989
Filed:
Apr. 15, 1987
Osamu Izumisawa, Nagano, JP;
Shinano Pneumatic Industries Inc., Nagano, JP;
Abstract
By transferring the power fed from a motor to a ratchet mechanism through means of an impact clutch mechanism, a relatively large torque is obtained by the impact clutch mechanism. In addition when a torque greater than a predetermined level is applied to the ratchet mechanism, reaction is never given to the operator's hand because the impact clutch mechanism does not transfer a force greater than the present torque to the ratchet mechanism, thus permitting safe operation. With the ratchet mechanism, moreover, it becomes possible to effect such operation as first loosening and removing by the operator's force such members as bolts and nuts which have been additionally tightened independently or strongly tightened to a level in excess of a certain torque preset for the device.