Textron Innovations Inc.

Bell Helicopter Textron Inc.

James L Braswell

Thomas C Campbell

David A Popelka

Richard Erler Rauber

Bryan Kenneth Baskin

Frank B Stamps

Daniel Bryan Robertson

Ernst C Schellhase

Charles L Hollimon

Keith Alan Stanney

David Allen Haynie

Lawrence M Corso

Thomas J Newman

Mark E Wasikowski

Christopher Mike Bothwell

Michael R Smith

Paul K Oldroyd

Charles Eric Covington

Patrick R Tisdale

Mark Adam Wiinikka

Cecil E Covington

Mithat Yuce

Tom Donovan

Timothy Kent Ledbetter

Ron Measom

Tom Campbell

Joseph J Zierer

Stanley G Sadler

Tricia Hiros

Michael J Southerland

Charles L Baskin

Ronnie Lee Martin

Joe J Zierer

Richard L Bennett

Bob Mullins

Jim Harse

D J Reddy

Ryan Smith

Thomas B Settle

A lead-lag damper for a rotor assembly has a body mounted to either an inboard portion of a blade assembly or a fixed portion of the rotor assembly. A piston carried within the body is configured to allow for relative motion between the body and the piston. The piston defines opposing chambers within the body, the chambers being in fluid communication through a fluid passage. A link connects the piston to the other of the inboard portion of the blade assembly and the fixed portion of the rotor assembly, and the link engages a central portion of the piston. The piston acts on fluid in the chambers during relative motion between the piston and the body and causes fluid flow between the chambers through the fluid passage. Flow through the passage acts to damp lead-lag motion of the blade assembly relative to the fixed portion of the rotor assembly.

Lead-lag damper for rotor hubs

An assembly for providing flexure to a blade of a rotary blade system, the assembly including 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 having a layer of cushioning material positioned thereon and secured thereto. The layer of cushioning material extending along and following the general contour of yoke surface, and the layer of cushioning material directly contacting a support plate. Another embodiment is 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.

Assembly for providing flexure to blade system

Growing community of inventors

Colleyville, TX, United States of America

James L Braswell