The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2004
Filed:
Feb. 07, 2002
Applicant:
Inventors:
Jeff Harley Miller, Simi Valley, CA (US);
Gary Alan Davis, Camarillo, CA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 5/26 ;
U.S. Cl.
CPC ...
F01D 5/26 ;
Abstract
An improved frictional damper for a rotor blade is positioned inside a cavity in the airfoil section of the blade. The cavity includes an elongated, generally radially-extending opening that divides the airfoil into two sections and an elongated opening transverse to and intersecting the radial opening. A damper placed within the cavity frictionally engages the resulting sections of the airfoil, thereby reducing the vibratory stresses on the blade as a whole.