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:
May. 14, 2019
Filed:
Jul. 23, 2014
Mitsumi Electric Co., Ltd., Tokyo, JP;
Kenichi Furukawa, Sagamihara, JP;
Kensuke Yamada, Tachikawa, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A power generatorincludes a power generating unitand a supporting memberfor supporting the power generating unit. The power generating unitconstitutes a two-degree-freedom vibration system including a first vibration system having a coil assemblyand a first spring portionfor coupling the coil assemblywith a housingand a second vibration system having a magnet assemblyand a second spring portionfor coupling the magnet assemblywith the coil assembly. The power generating unitis configured so that each of a first natural frequency ωof the first vibration system and a second natural frequency ωof the second vibration system is in the range of 14 to 42 Hz.