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:
Nov. 02, 1999
Filed:
Aug. 01, 1997
Masato Iwata, Kiryu, JP;
Mitsuba Corporation, Kiryu, JP;
Abstract
An electric motor is constructed by tightening set bolts to secure a yoke opened at one end to a bracket mounted on the yoke open end. The outer ring of bearings is press-fitted into the yoke, the inner ring of the bearings is press-fitted around an armature shaft, and the bearings are free from an undue excessive axial load during the tightening the set bolts, without the need for fixing the outer ring to the yoke. A gap between the inner ring of the bearings and a step portion of the armature shaft for restricting the displacement of the inner ring toward the yoke open end, or a gap between the outer ring of the bearings and the closed end of a bearing housing for restricting the displacement of the outer ring in the direction opposite the direction toward the yoke open end, or the sum of both gaps, prior to tightening the set bolts, is set to be greater than the axial deformation of the yoke resulting from the tightening of the set bolts.