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:
Oct. 13, 2009
Filed:
Jul. 27, 2006
Steven J. Vance, Oviedo, FL (US);
Jay A. Morrison, Oviedo, FL (US);
Steven J. Vance, Oviedo, FL (US);
Jay A. Morrison, Oviedo, FL (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
A CMC airfoil () formed with CMC stitches () interconnected between opposed walls () of the airfoil to restrain outward flexing of the walls resulting from pressurized cooling air within the airfoil. The airfoil may be formed of a ceramic fabric infused with a ceramic matrix and dried, and may be partially to fully cured. Then holes () are formed in the opposed walls of the airfoil, and a ceramic stitching element such as ceramic fibers () or a ceramic tube () is threaded through the holes. The stitching element is infused with a wet ceramic matrix before or after threading, and is flared () or otherwise anchored to the walls () to form a stitch () there between. The airfoil and stitch are then cured. If the airfoil is cured before stitching, a pre-tension is formed in the stitch due to relative curing shrinkage.