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:
Dec. 31, 2002
Filed:
Dec. 06, 2000
Noriaki Katayama, Kakamigahara, JP;
Tatsuro Hongu, Kakamigahara, JP;
Eiichi Yamakawa, Kakamigahara, JP;
Abstract
Displacements of output portions of a pair of piezoelectric actuators arranged spanwise in a flap drive apparatus are magnified by a displacement magnification mechanism so that a swing arm is driven in swinging fashion with large amplitude. A flap attached to the trailing edge of a blade by way of a connecting rod connected to a tip of the swing arm is driven in vertical angular displacement fashion. The displacement magnification mechanism possesses an eccentric shaft has a first shaft and second shaft with offset axes. An output portion is coupled to the first shaft , and an output portion is coupled to the second shaft . The swing arm is fixed to the eccentric shaft . Displacement of the output portions of the actuators in opposite phase results in a stable swing of the swing arm