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:
Jul. 13, 1999
Filed:
May. 19, 1997
Toshihiro Tsutsui, Wako, JP;
Keiichirou Takatou, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A piezoelectric fan comprises at least one piezoelectric element having a rectangular piezoelectric plate of large aspect ratio, made from a piezoelectric material, and conductive metal layers provided on both surfaces of the piezoelectric plate. At least one of the conductive metal layers has a plurality of reinforcing ribs extending parallel to the long side of the piezoelectric element and formed integrally with the conductive metal layers or as a separate member collectively. The reinforcing ribs increase the long side direction rigidity of the piezoelectric element. As a result, the long side direction or lateral mode resonance of the piezoelectric element can be suppressed, thus increasing the blow efficiency of the piezoelectric fan.