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. 26, 2010
Filed:
May. 07, 2007
Gary B. Merrill, Orlando, FL (US);
Steven J. Vance, Orlando, FL (US);
Gary B. Merrill, Orlando, FL (US);
Steven J. Vance, Orlando, FL (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
A pattern of depressions () in a sealing surface () on a CMC wall () of gas turbine ring segment () allows minimum clearance against turbine blades tips, and thus maximizes working gas sealing. An array of depressions () on the surface () increases abradability of the surface () by blade tip contact during zero clearance conditions and reduces blade tip damage. The depressions () are unconnected, preventing bypass of the working gas around the blade tips. A desired abradable surface geometry may be formed in a stacked laminate wall construction (-) by staggered laminate edge profiles () or by machining of depressions () after construction.