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:
Feb. 13, 2007
Filed:
Jun. 29, 2004
Hidetoshi Tanaka, Kokubunji, JP;
Norio Ohkubo, Tokyo, JP;
Hidetoshi Tanaka, Kokubunji, JP;
Norio Ohkubo, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A piezoelectric power generation system which performs a highly efficient power generation using a piezoelectric element without dependency on the direction of an externally driven vibration. The piezoelectric power generation system includes a vibrator having a beam in the form of a rod, and an impact element such as a steel ball. At one end of the beam is fixed the impact element, and at the other end of the beam, the beam is fixed to the base. The outer circumference of the impact element carries the cylinder shaped piezoelectric element. When the base vibrates due to an externally driven vibration, the vibrator vibrates in synchronization with the given vibration in the radial direction of the base to cause the impact element of the base to impact with the inner surface of the cylindrical piezoelectric element, forcing the piezoelectric element to deform and thereby generate electrical power. The dependency on the vibration direction in the vibrator is minimized to significantly improve the efficiency of power generation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile