Patent · US Expired

Rotor blade especially for rotary wing aircraft

US4252503A · kind A · utility

5Cited by

11References

9Claims

0Family size

Assignee

Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung · DE

Inventors

Peter Wackerle · Ottobrunn, DE
Otmar Friedberger · Neubiberg, DE
Emil Weiland

Key dates

Filing date	Feb 26, 1979
Grant date	Feb 24, 1981
Priority date	—
Expiry date	Feb 26, 1999

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB64C27/51
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A rotor blade has a neck section which connects the blade proper to a rotor ead at the blade root. The neck section is flexible against bending in the lead-lag direction and in the flapping direction. A carrier member is located alongside or inside the neck section but spaced from the neck section. The carrier member is resistant against bending at least in the lead-lag direction or in the flapping direction. The carrier member is rigidly connected at its one end to the blade proper. A layer of a damping material is operatively interposed between the carrier member and the neck section, preferably at the blade root end of the neck section, whereby blade vibrations preferably in the lead-lag direction are damped and substantially prevented from entering into the rotor head.

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