Title:
ROTOR HUB VIBRATION ATTENUATOR
Document Type and Number:
WIPO Patent Application WO/2017/209827
Kind Code:
A3
Abstract:
A vibration attenuation system for attenuating vibrations in a mast of an aircraft includes a weight attached to the mast but free to orbit about the mast. The weight can be comprised of one or more weight assemblies. Embodiments can include a single weight, or plural weight assemblies wherein each weight assembly can include a mechanical interconnecting mechanism so that each weight assembly receives feedback regarding the position and movement of one or more other weight assemblies. Each weight can be associated with a spring that urges the weight towards a neutral position. Rotation of the mast can cause the weight to orbit about the mast and self-excite such that the weight acts against the urging of the spring towards an attenuating position.
Inventors:
CHOI JOUYOUNG JASON (US)
HEVERLY DAVID (US)
KIZHAKKEPAT AMARJIT O (US)
PARHAM THOMAS (US)
SEIFERT MICHAEL (US)
SMITH MICHAEL (US)
STAMPS FRANK B (US)
GAY FREDERICK S (US)
HEVERLY DAVID (US)
KIZHAKKEPAT AMARJIT O (US)
PARHAM THOMAS (US)
SEIFERT MICHAEL (US)
SMITH MICHAEL (US)
STAMPS FRANK B (US)
GAY FREDERICK S (US)
Application Number:
PCT/US2017/022380
Publication Date:
February 08, 2018
Filing Date:
March 14, 2017
Export Citation:
Assignee:
BELL HELICOPTER TEXTRON INC (US)
International Classes:
B06B1/16; B64C27/00; B64C27/32; B64C27/51; F16F15/10
Foreign References:
| US20140360830A1 | 2014-12-11 | |||
| US5647726A | 1997-07-15 | |||
| US5456341A | 1995-10-10 | |||
| US3219120A | 1965-11-23 | |||
| US6045090A | 2000-04-04 | |||
| US4403681A | 1983-09-13 | |||
| US20060222505A1 | 2006-10-05 | |||
| US8474745B2 | 2013-07-02 |
Other References:
See also references of EP 3429921A4
Attorney, Agent or Firm:
LIGHTFOOT, Alan Dawson et al. (US)
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