Patent · US Active

Rotor system for an aircraft

US12208889B2 · kind B2 · utility

0Cited by

3References

15Claims

0Family size

Assignee

Kopter Germany GmbH · DE

Inventors

Daniel Redmann · Birkenfeld, DE
Nicolai Stadlmair · Munich, DE
Andreas Dummel · Hohenbrunn, DE

Key dates

Filing date	Jan 22, 2021
Grant date	Jan 28, 2025
Priority date	—
Expiry date	Apr 9, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2260/96
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

Disclosed is a rotor system for an aircraft including a rotor having multiple rotor blades disposed about an axis of rotation of the rotor substantially radially. A plane perpendicular to the axis of rotation, which extends through the rotor blades in a radial direction, forms a rotor plane. A rotor shroud surrounds the rotor circumferentially with regard to the axis of rotation, confines an air duct of the rotor extending in an axial direction of the axis of rotation, and forms a hollow structure extending circumferentially with regard to the axis of rotation. The hollow structure has on its circumferential face facing the rotor in the radial direction an area permeable to gas. The rotor plane intersects the area, and the hollow structure is configured to at least partially absorb acoustic waves of at least one frequency penetrating through the area.

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