Multi-rotor rotorcraft

US11673657B2 · kind B2 · utility

Assignee

• The Boeing Company · US

Inventors

• Michael J. Duffy · Lansing, US
• Joshua B. Jarvis · Chesterfield, US
• Roger W. Lacy · West Chester, US
• David M. Neely · Kirkwood, US
• Eric J. Schulze · Hockessin, US

Key dates

• Filing date: May 31, 2019
• Grant date: Jun 13, 2023
• Expiry date: Mar 25, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64U2101/61
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Multi-rotor rotorcraft comprise a fuselage, and at least four rotor assemblies operatively supported by and spaced-around the fuselage. Each of the at least four rotor assemblies defines a spin volume and a spin diameter. Some multi-rotor rotorcraft further comprise at least one rotor guard that is fixed relative to the fuselage, that borders the spin volume of at least one of the at least four rotor assemblies, and that is configured to provide a visual indication of the spin volume of the at least one of the at least four rotor assemblies. Various configurations of rotor guards are disclosed.