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. 21, 2001
Filed:
Oct. 04, 1999
Makita Corporation, Anjo, JP;
Abstract
A grinder,includes a spindle,having a small-diameter section,and a medium-diameter section,and a motor shaft,on which a pinion gear,is provided. The grinder,further includes a bevel gear,which is provided on the small-diameter section,of the spindle,and engages the pinion gear,and a lock sleeve,provided below the bevel gear,on the medium-diameter section,A coupling groove,is provided in the lower surface of the bevel gear,opposing the upper surface of the lock sleeve,The coupling groove,has an external diameter coaxial with and equal to the inner diameter of the lock sleeve,and further has an inner diameter coaxial with and equal to the external diameter of the medium-diameter section,An inner coil spring,is fitted around the second peripheral surface such that half the length of the coil spring covers the inner peripheral surface of the coupling groove,whereas the other half covers the outer peripheral surface of the medium-diameter section,In addition, an outer coil spring,is fitted around the first peripheral surface such that half the length of the coil spring covers the outer peripheral surface of the coupling groove,whereas the other half covers the inner peripheral surface of the lock sleeve,The grinder,additionally includes a gear housing,and a locking device,for locking the bevel gear