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:
Dec. 23, 2014
Filed:
Aug. 02, 2011
Christian X. Campbell, Oviedo, FL (US);
Anand A. Kulkarni, Oviedo, FL (US);
Allister W. James, Chuluota, FL (US);
Brian J. Wessell, Orlando, FL (US);
Paul J. Gear, Longwood, FL (US);
Christian X. Campbell, Oviedo, FL (US);
Anand A. Kulkarni, Oviedo, FL (US);
Allister W. James, Chuluota, FL (US);
Brian J. Wessell, Orlando, FL (US);
Paul J. Gear, Longwood, FL (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
Bi-casting a platform () onto an end portion () of a turbine airfoil () after forming a coating of a fugitive material () on the end portion. After bi-casting the platform, the coating is dissolved and removed to relieve differential thermal shrinkage stress between the airfoil and platform. The thickness of the coating is varied around the end portion in proportion to varying amounts of local differential process shrinkage. The coating may be sprayed (A,B) onto the end portion in opposite directions parallel to a chord line () of the airfoil or parallel to a mid-platform length () of the platform to form respective layers tapering in thickness from the leading () and trailing () edges along the suction side () of the airfoil.