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:
Mar. 18, 2003
Filed:
Jun. 20, 2002
David Patrick Hurley, Dublin, IE;
John Michael David Coey, Dublin, IE;
Magnetic Solutions (Holdings) Limited, Dublin, IE;
Abstract
A device ( ) for generating a variable composite magnetic field comprises top and bottom concentric ring members ( ) which define a main central axis ( ) and a central area ( ) within which the composite magnetic filed is formed. Rod-like permanent magnets are located thin respective annuli ( ) of the respective ring members ( ), and are equi-spaced circumferentially along a pitched circle ( ). The permanent magnets ( ) are rotable about corresponding secondary axes ( ) which extend parallel to each other and parallel to the main central axis ( ). The permanent magnets ( ) are magnetised with their respective direction of magnetisation extending transversely of their secondary axes ( ) and are independently rotatable by corresponding stepper motors ( ) in respective of annuli ( ) of the ring members ( ) for orienting the permanent magnets ( ) about their respective secondary axes ( ) for in turn altering the composite magnetic field generated in the central area ( ).