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:
May. 11, 1999
Filed:
Dec. 18, 1997
Applicant:
Inventors:
Assignee:
Oppama Industry Co. Ltd., Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310156 ; 310 43 ; 310 51 ; 310153 ;
Abstract
A rotor core is provided with a pole piece portion holding a magnet and a balance weight portion, wherein said hub fitting hole is inserted a metal hub having a tapered axis hole and part fitting portion so as to be fixed each other, and said rotor core is coated with synthetic resins, thereby the use of metal can be limited only to parts where mechanical strength is required so that the whole rotor weight can be reduced and can be assembled easily, and be allow various parts can be fitted stably, and the degradation of magnetic properties of the magnet can be prevented.