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:
Aug. 29, 2000
Filed:
Jan. 29, 1999
Eiichi Yamakawa, Kakamigahara, JP;
Tatsuro Hongu, Kakamigahara, JP;
Mitsumasa Sato, Kakamigahara, JP;
Shun-ichi Bandoh, Kakamigahara, JP;
Advanced Technology Institute of Commuter-Helicopter, Ltd., Kakamigahara, JP;
Abstract
A flap is attached to a rear end of a blade so as to be angularly displaceable. Displacement magnifying means magnifies the amount of displacement from an actuator to drive the flap. An input portion to which the displacement is applied from the actuator is expandably and contractibly supported by bellows. Likewise, an output portion to which the input amount of displacement is magnified is expandably and contractibly supported by a bellows. Consequently, displacement magnifying means is realized in which, compared with a existing piston with O ring which slides on the cylinder inner wall, no deterioration in response characteristic due to high friction occurs when the actuator is displaced at high speed, and no fluid leakage due to deterioration or wear of the O ring occurs. According to this structure, a rotor blade flap driving apparatus is obtained which has displacement magnifying means with fast response and no fluid leakage.