Tension torsion strap

US10604247B2 · kind B2 · utility

Assignee

• SIKORSKY AIRCRAFT CORPORATION · US

Inventors

• David A. Darrow, Jr. · Mesa, US
• Ron William Waldo · Oosterdijk, US
• Joshua Richards · Fort Worth, US
• Kristopher Michael Haydel · Fort Worth, US
• Lance Halcom · Coppell, US

Key dates

• Filing date: Jun 9, 2016
• Grant date: Mar 31, 2020
• Expiry date: Nov 25, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/10
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A tension torsion strap by which a blade is connectable with a hub of a propulsor is provided. The tension torsion strap includes an elongate body formed to define attachment features at opposite ends thereof, the attachment features being connectable to the blade at one of the opposite ends and to the hub at the other of the opposite ends, fibrous materials extending along the elongate body and around the attachment features and pretension flanges elastically interposable between the hub and the elongate body. The pretension flanges are configured to maintain pretension in the fibrous materials above a predefined pretension level when the attachment features are connected to the blade and the hub.