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:
Jan. 04, 2022
Filed:
Nov. 21, 2018
Bell Helicopter Textron Inc., Fort Worth, TX (US);
Frank Bradley Stamps, Colleyville, TX (US);
David Heverly, Arlington, TX (US);
Michael R. Smith, Colleyville, TX (US);
Michael Scott Seifert, Southlake, TX (US);
Thomas C. Parham, Jr., Colleyville, TX (US);
Gary Miller, North Richland Hills, TX (US);
Jouyoung Jason Choi, Southlake, TX (US);
Richard E. Rauber, Colleyville, TX (US);
Textron Innovations Inc., Providence, RI (US);
Abstract
A vibration attenuator for an aircraft has first and second coaxial spinners configured for rotation about a mast axis and relative to a rotor. Upper and lower weights of each spinner are spaced radially from the axis and positioned 180 degrees from each other about the axis. The weights of each spinner are spaced from each other a distance parallel to the mast axis, each weight rotating about the mast axis in a different plane. The spinners rotate together relative to the rotor at a selected angular rate and are selectively rotatable relative to each other between a minimum-moment configuration, in which the upper weight of each spinner is angularly aligned with the lower weight of the other spinner, and a maximum-moment configuration, in which the upper weights are angularly aligned and the lower weights are angularly aligned, producing a whirling moment about the mast axis as the spinners rotate.