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:
Aug. 04, 2009
Filed:
Apr. 16, 2004
David C. Bono, Wellesley, MA (US);
Alan Sliski, Lincoln, MA (US);
Jiankang Huang, Roslindale, MA (US);
Robert C. O'handley, Andover, MA (US);
David C. Bono, Wellesley, MA (US);
Alan Sliski, Lincoln, MA (US);
Jiankang Huang, Roslindale, MA (US);
Robert C. O'Handley, Andover, MA (US);
Ferro Solutions, Inc., Woburn, MA (US);
Abstract
An inductive energy harvester comprises a permanent magnet magnetic field source attached by a pair of compact spiral disk springs to an induction coil. The springs position the magnet so that the induction coil surrounds one end of the magnet where the flux density is greatest. In addition, the magnetic flux emerging from that end of the magnet is enhanced by a disk of magnetic material having high permeability and high flux density. In another embodiment, the magnetic field source comprises two dipole magnets arranged in opposing flux relationship with a thin layer of high flux density, high magnetic permeability material located in a gap between the magnets.