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. 06, 2015
Filed:
Feb. 25, 2014
Siemens Aktiengesellschaft, München, DE;
Kok-Mun Tham, Oviedo, FL (US);
Vincent P. Laurello, Hobe Sound, FL (US);
Ching-Pang Lee, Cincinnati, OH (US);
Gm Salam Azad, Oviedo, FL (US);
Nicholas F. Martin, Jr., York, SC (US);
David G. Sansom, Lake Wyle, SC (US);
Neil Hitchman, Charlotte, NC (US);
SIEMENS AKTIENGESELLSCHAFT, München, DE;
Abstract
Turbine and compressor casing abradable component embodiments for turbine engines, with composite grooves and vertically projecting alternating rows of first and second height ridges in planform patterns, to reduce, redirect and/or block blade tip airflow leakage downstream into the grooves rather than from turbine blade airfoil high to low pressure sides. The first ridges have a first ridge height greater than that of the second ridges. These ridge or rib embodiments have first lower and second upper wear zones. The lower zone, at and below the second ridge height, optimizes engine airflow characteristics, while the upper zone, between tips of the second and first ridges, is optimized to minimize blade tip gap and wear by being more easily abradable than the lower zone.