Patent · US Active

Soft in-plane and stiff out-of-plane rotor system

US9656747B2 · kind B2 · utility

7Cited by

14References

13Claims

0Family size

Assignee

Bell Helicopter Textron Inc. · US

Inventors

Ken Shundo · Fort Worth, US
Mithat Yuce · Corinth, US
Frank B. Stamps · Colleyville, US

Key dates

Filing date	Mar 14, 2013
Grant date	May 23, 2017
Priority date	—
Expiry date	Mar 16, 2036

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB64C27/52
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A rotor assembly includes a yoke operably associated with a rotor blade. The yoke includes a first device and a second device that attach the rotor blade to the yoke. The first device is configured to allow transverse movement of the rotor blade about a chord axis and rotational movement about a pitch-change axis. The second device is configured to allow rotational movement of the rotor blade solely about the pitch-change axis. The method includes rotating rotor assembly about a first plane of rotation, while retaining a relatively stiff out-of-plane rotation and a relatively soft in-plane rotation during flight.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.