Hub for rotor head of rotary-wing aircraft and rotor head with such hub

Patent 6200097 Issued on March 13, 2001. Estimated Expiration Date:

October 21, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Integrated hub-mast and gyroplane rotor head comprising it
Patent #: 4732540
Issued on: 03/22/1988
Inventor: Mouille , et al.

Device of retractable stops for rotor blades of giroplanes, and rotor head including such a device
Patent #: 5116209
Issued on: 05/26/1992
Inventor: Anglade, et al.

Gyrocraft rotor hub body
Patent #: 5267833
Issued on: 12/07/1993
Inventor: Mouille

Main rotor system for helicopters Patent #: 5906476
Issued on: 05/25/1999
Inventor: Arlton

Inventor

Mouille, Rene

Application

No. 171533 filed on 10/21/1998

US Classes:

416/107, Resilient bias or limit stop416/140, Including movement limit stop or damping means416/244RSUPPORT MOUNTING, CARRIER OR FAIRING STRUCTURE

Examiners

Primary: Look, Edward K.
Assistant: Rodriguez, Hermes

Attorney, Agent or Firm

Stevens, Davis, Miller & Mosher, L.L.P.

Foreign Patent References

3510073 DE. 09/11/1986
2671049 FR. 07/11/1992
2689483 FR. 10/11/1993

International Class

B64C 027/51

Foreign Application Priority Data

1997-03-06 FR

Abstract

A hub for the rotor head of a rotary-wing aircraft having a plurality of blades radially linked to the hub by a blade root provided with a rigid hub includes spherical stops associated with the blades, which stops have an inner armature linked to the root of the blade and an outer armature linked to the hub. The hub includes an upper plate and a lower plate formed of two separate components which are assembled with an outer armature of spherical stops being interposed therebetween, so that the spherical stops are housed in the space defined by the plates. The outer armature is arranged at the periphery of the plates so that a hollow hub is obtained without requiring a sidewall with apertures, so as to facilitate the mounting and/or removal of the blades and the spherical stops. The plates may have a triangular shape with cutoff corners wherein a plurality of outer armatures is arranged near the cut-off corner.