Assembly for providing flexure to blade system

US7845909B2 · kind B2 · utility

Assignee

• Textron Innovations Inc. · US

Inventors

• Frank B. Stamps · Colleyville, US
• Patrick R. Tisdale · Keller, US
• Paul Sherrill · Grapevine, US
• Richard E. Rauber · Arlington, US
• Thomas C. Campbell · Wichita Falls, US
• James L. Braswell, Jr. · Colleyville, US
• Ron Measom · Hurst, US
• Tricia Hiros · Hurst, US
• David A. Popelka · Colleyville, US
• Michael J. Southerland · Oosterdijk, US
• Keith Alan Stanney · Fort Worth, US
• Mark Wasikowski · Keller, US
• Tim Ledbetter · Fort Worth, US

Key dates

• Filing date: Jan 24, 2006
• Grant date: Dec 7, 2010
• Expiry date: Jan 31, 2028

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/33
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An assembly for providing flexure to a blade of a rotary blade system includes an upper support plate having an upper curved surface, a lower support plate having a lower curved surface, and a yoke positioned therebetween. At least one of the upper and lower yoke surfaces has a layer of cushioning material positioned thereon and secured thereto. An alternate embodiment includes an assembly for providing flexure to a blade of a rotary blade system, including, an upper support plate having an upper curved surface, a lower support plate having a lower curved surface, and a yoke positioned therebetween and directly contacting the support plates wherein one of the curved surfaces is a non-circular arc that does not form part of the circumference of a circle. Another alternate embodiment includes a similar assembly having a twist-shank type of yoke for providing rotation of attached blades about their respective pitch axes.