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:
Jan. 28, 2003
Filed:
Feb. 05, 2002
Applicant:
Inventor:
Alec G Dodd, Derby, GB;
Assignee:
Rolls-Royce plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 9/04 ; F01D 1/100 ;
U.S. Cl.
CPC ...
F01D 9/04 ; F01D 1/100 ;
Abstract
Two stages of relatively rotatable guide vanes ( ) are arranged in tandem. Shroud portions ( ) on the vanes overlap in loose engagement, until an associated gas turbine engine starts operating. Gas loads then act on the downstream vane stage ( ) and move it in a downstream direction until the opposing flanks of radially opposing lands ( ) on respective shrouds ( ) engage, whereupon, gas leakage via the overlap onto the turbine casing ( ) is at least substantially reduced.