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:
Jul. 11, 2000
Filed:
Dec. 22, 1998
Applicant:
Inventor:
Yutaka Ishizuka, Nagano, JP;
Assignee:
Sankyo Seiki Mfg. Co., Ltd., Nagano-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 91 ; 384100 ;
Abstract
A rotary polygonal mirror driving apparatus comprises a rotor to which a driving magnet is attached, a stator disposed opposite to the driving magnet, a rotary polygonal mirror having a center hole through which a portion of the rotor is mounted so that it is mounted on a mirror mounting portion of the rotor and a cap is fixed to the rotor so that the rotary polygonal mirror is pushed in a thrust direction to be fixed onto the rotor. A top annular groove and a bottom annular groove concentric with the center hole are provided, which are cut in top and bottom surfaces in a mutually overlapping area radially further out than the mirror portion of the rotor.