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:
Sep. 04, 2001
Filed:
Feb. 26, 1999
Edward Claude Rice, Indianapolis, IN (US);
Robert Anthony Ress, Jr., Carmel, IN (US);
Jeffrey Lister Hansen, Indianapolis, IN (US);
Allison Advanced Development Company, Indianapolis, IN (US);
Abstract
A gas turbine engine variable vane having a winglet integrally formed therewith. In one embodiment, the variable vane includes a winglet attached to one end so as to reduce endwall losses resulting from air leakage from the high-pressure side to the low-pressure side of the airfoil. The winglet substantially increases the width of the endwall gap thereby reducing the loss associated with the vortex flow caused by leakage of gas from the pressure side to the section side of the airfoil. In another aspect the winglet runs along the airfoil thereby increasing stiffness and acting as a bracing strut to increase the resonant frequency of the airfoil.