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. 05, 2005
Filed:
Jul. 27, 2004
Andrew M. Wright, Cambridge, MA (US);
David Cope, Medfield, MA (US);
Andrew M. Wright, Cambridge, MA (US);
David Cope, Medfield, MA (US);
Engineering Matters, Inc., Newton Upper Falls, MA (US);
Abstract
At least one set of two nested magnetic arrays is provided, each nested magnetic array having an outer magnet, a middle magnet, and an inner magnet. The outer magnet has a magnetization pointing in an at least partially axial direction. The middle magnet has a magnetization substantially perpendicular to the magnetization of the outer magnet. The inner magnet has a magnetization directed substantially anti-parallel to the magnetization of the outer magnet. The apparatus also includes at least one electrically conductive coil positioned at least partially between the two nested magnetic arrays. At least one substantially magnetically permeable object is positioned at least partially between the two nested magnetic arrays. A rod is integral with the substantially magnetically permeable object.