Patent · US Expired

Rotor structure for a rotary wing aircraft

US4432696A · kind A · utility

11Cited by

10References

5Claims

0Family size

Assignee

Messerschmitt Bolkow Blohm GmbH · DE

Inventors

Michael Stephan · Berlin, DE
Karlheinz Mautz · Ottobrunn, DE
Alois Schwarz · Putzbrunn, DE

Key dates

Filing date	Sep 8, 1981
Grant date	Feb 21, 1984
Priority date	—
Expiry date	Sep 8, 2001

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB64C27/58
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

The blade angle of the blades of a rotary wing aircraft is adjusted by a control rod (5) inside the hollow rotor head operating a control shaft (8) extending radially out of the rotor head in axial alignment with the blade angle adjustment axis. The adjustment movement of the shaft (8) is transmitted to the respective blade (3.3) by a yoke (11, 12) and a torsion-stiff sleeve (7) which bridge the blade root (3.1) and the torsion yielding blade neck (3.2) respectively. The blade root (3.1) is connected to the rotor hub (1) by a forked member (2) through which a portion (11) of the yoke extends for connection to the control shaft.

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