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:
Feb. 25, 2003
Filed:
Jul. 10, 2001
Applicant:
Inventors:
Peter G G Farrar, Derby, GB;
Christopher Freeman, Nottingham, GB;
Assignee:
Rolls-Royce plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 5/14 ;
U.S. Cl.
CPC ...
F01D 5/14 ;
Abstract
A gas turbine engine fan blade ( ) comprises a root portion ( ) and an aerofoil portion ( ). The aerofoil portion ( ) has a convex surface ( ), a concave surface ( ), a leading edge ( ) and a trailing edge ( ). The leading edge ( ) of the aerofoil portion ( ) is formed from a harder material than the regions of the concave surface ( ) and convex surface ( ) immediately adjacent the leading edge ( ) such that the leading edge ( ) of the aerofoil portion ( ) remains pointed. This improves the efficiency of the fan blade ( ) and hence the gas turbine engine ( ) and reduces flutter of the fan blade ( ).