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:
Nov. 12, 2013
Filed:
Nov. 06, 2009
Applicants:
Christian X. Campbell, Oviedo, FL (US);
John J. Marra, Winter Springs, FL (US);
Inventors:
Christian X. Campbell, Oviedo, FL (US);
John J. Marra, Winter Springs, FL (US);
Assignee:
Siemens Energy, Inc., Orlando, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 5/14 (2006.01); F01D 5/16 (2006.01); F01D 5/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
An airfoil () is provided with a tip () having an opening () to a center channel (). A damping element () is inserted within the opening of the center channel, to reduce an induced vibration of the airfoil. The mass of the damping element, a spring constant of the damping element within the center channel, and/or a mounting location () of the damping element within the center channel may be adjustably varied, to shift a resonance frequency of the airfoil outside a natural operating frequency of the airfoil.