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. 04, 1989
Filed:
Sep. 18, 1986
Applicant:
Inventors:
Albert Dierkes, Planegg, DE;
Joachim Gilly, Estenfeld, DE;
Ernst Grecksch, Estenfeld, DE;
Friedrich Schellenberger, Hammelburg, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 9801 ; 360 9908 ; 360133 ;
Abstract
A low-cost, compact disk pack drive with an external rotor motor permanent magnet-excited by sintered ferrite magnets in the form of partial shells is to be provided. The external rotor motor is arranged inside the pack space of the disk pack and sintered ferrite excitation magnets are used, having a surface metallization which have been sealed.