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:
Dec. 24, 2002
Filed:
Oct. 26, 2000
Applicant:
Inventor:
Anthony R. Hearn, South Wonston, GB;
Assignee:
Xyratex Technology Limited, Hampshire, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 1/702 ; G11B 1/920 ; H02K 3/316 ;
U.S. Cl.
CPC ...
G11B 1/702 ; G11B 1/920 ; H02K 3/316 ;
Abstract
A low speed moving magnet motor ( ) has a moving magnet ( ) and a stationary coil ( ) for carrying an electric current and disposed in relation to the moving magnet ( ) such that a magnetic field generated when a current flows through the coil ( ) causes the moving magnet ( ) to move relative to the coil. A magnetic return path member ( ) is fixed in relation to the coil ( ) to provide a return path for a magnetic field generated by the coil ( ) and the moving magnet ( ). In an example, the magnetic return path member ( ) is free of insulating laminations. The moving magnet ( ) is mounted on a rotor ( ) of the motor ( ) which has a high inertia.