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:
Nov. 08, 2016
Filed:
Nov. 20, 2014
Peter Finkel, Baltimore, MD (US);
Ahmed H Amin, North Attleboro, MA (US);
Marilyn Wun-fogle, Potomac, MD (US);
James B Restorff, College Park, MD (US);
Joseph J Stace, Narragansett, RI (US);
Colin J Murphy, Newport, RI (US);
Peter Finkel, Baltimore, MD (US);
Ahmed H Amin, North Attleboro, MA (US);
Marilyn Wun-Fogle, Potomac, MD (US);
James B Restorff, College Park, MD (US);
Joseph J Stace, Narragansett, RI (US);
Colin J Murphy, Newport, RI (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An energy harvesting device for harvesting energy from a moving structure includes a housing allowing transmission of magnetic fields therethrough. A piezoelectric material capable of a phase transition and a magnetostrictive material capable of a structural change when subjected to a magnetic field are mechanically coupled to each other in the housing. An adjustable pre-stress means is positioned between the housing and the combination of the piezoelectric and magnetostrictive materials. Electrical contacts are positioned on the piezoelectric material. A magnet is mounted on the moving structure. The housing is mounted in sufficient proximity to the magnet for the magnetic field of the magnet to induce the structural change in the magnetostrictive material.