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. 27, 1987
Filed:
Mar. 20, 1987
Applicant:
Inventor:
John L Winter, Derby, GB;
Assignee:
Rolls-Royce, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415116 ; 415115 ;
Abstract
The cooling air from the nozzle guide vanes of a gas turbine engine is discharged from one or both platforms to discourage leakage flow between rotating and static components of the engine. In the case of the outboard platform the cooling air is discharged towards the engine casing to flow through the clearance between the shroud of the engine casing and the shroud of the turbine blades. This arrangement reduces the leakage flow of gas from the main gas stream and assists in reducing casing temperatures.