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. 29, 2011
Filed:
Apr. 05, 2010
M. Benton Free, Saint Paul, MN (US);
Bernard O. Geaghan, Salem, NH (US);
Karl P. Hauck, Pembroke, NH (US);
Albert H. Libbey, Eliot, ME (US);
Billy Lee Weaver, Eagan, MN (US);
M. Benton Free, Saint Paul, MN (US);
Bernard O. Geaghan, Salem, NH (US);
Karl P. Hauck, Pembroke, NH (US);
Albert H. Libbey, Eliot, ME (US);
Billy Lee Weaver, Eagan, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An energy transfer apparatus with a magnetic shield is configured to magnetically couple energy from a fixed location to a mobile or moveable device within a field-activated space of the energy transfer apparatus. Apparatuses include a location sensing surface and a drive coil arranged in relation to a periphery of the location sensing surface. A magnetic shield plate is disposed below the location sensing surface and the drive coil. The shield plate includes a number of radially oriented slots originating at, and distributed about, a periphery of the shield plate.