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. 02, 2014
Filed:
Apr. 19, 2011
Vincent Girard, Venelles, FR;
Arnaud Varin D'ainvelle, Les Milles, FR;
Vincent Girard, Venelles, FR;
Arnaud Varin D'Ainvelle, Les Milles, FR;
Airbus Helicopters, Marignane Cedex, FR;
Abstract
A device () for reducing the vibration of a rotorcraft main rotor () provided with a hub () and a plurality of blades, said device having a support () together with at least one weight element (). Said weight element () is fastened to said support () by connection means (), and said weight element () is connected to said connection means () by guide means () for guiding said weight element () in movement in circular translation in a filter plane (P) that is movable perpendicularly to an elevation axis (AX) of said device (), said connection means () including resilient return means () serving to allow said filter plane (P) to move in elevation while keeping the filter plane (P) perpendicular to said elevation axis (AX) under the effect of said vibration.