US 11,685,521 B2
Rotor hub vibration attenuator
Jouyoung Jason Choi, Southlake, TX (US); David Heverly, Arlington, TX (US); Michael Seifert, Southlake, TX (US); Michael Smith, Colleyville, TX (US); Frank Bradley Stamps, Colleyville, TX (US); Thomas C. Parham, Jr., Colleyville, TX (US); and Amarjit Olenchery Kizhakkepat, Fort Worth, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Textron Innovations Inc., Providence, RI (US)
Filed on Aug. 9, 2021, as Appl. No. 17/397,956.
Application 17/397,956 is a continuation of application No. 16/084,970, granted, now 11,084,575, previously published as PCT/US2017/022380, filed on Mar. 14, 2017.
Application 16/084,970 is a continuation in part of application No. 15/350,073, filed on Nov. 13, 2016, granted, now 10,562,617, issued on Feb. 18, 2020.
Claims priority of provisional application 62/456,646, filed on Feb. 8, 2017.
Claims priority of provisional application 62/308,012, filed on Mar. 14, 2016.
Prior Publication US 2021/0362842 A1, Nov. 25, 2021
Int. Cl. B64C 27/00 (2006.01); F16F 7/116 (2006.01); F16F 15/14 (2006.01)
CPC B64C 27/001 (2013.01) [F16F 7/116 (2013.01); B64C 2027/003 (2013.01); F16F 15/14 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A vibration attenuator, comprising:
a first spinner configured for rotation about a first axis;
a first mass coupled to the first spinner for rotation therewith, the first mass being movable radially relative to the first axis between an inner position and an outer position;
an actuator coupled to the first mass for selectively controlling a radial location of the first mass relative to the first axis;
a second spinner configured for rotation about a second axis;
a second mass coupled to the second spinner for rotation therewith, the second mass being movable radially relative to the second axis between an inner position and an outer position;
an actuator coupled to the second mass for selectively controlling a radial location of the second mass relative to the second axis; and
a first motor for driving the first spinner in rotation about the first axis and the second spinner in rotation about the second axis.