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. 30, 1990
Filed:
May. 08, 1989
Applicant:
Inventor:
Robert C Tonks, Bridgwater, GB;
Assignee:
Rolls-Royce plc, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415115 ; 415161 ; 416 / ;
Abstract
A nozzle guidevane for a gase turbine engine 10 comprising a first fixed upstream portion 24, a movable downstream portion 26 and a seal situated therebetween. The seal comprises two pairs of ridges 56, 58 on the upstream portion and two ridges 60 on the downstream portion 26 which co-operate with each other to form a flow restrictor which maintains the flow of escaping air within acceptable limits. The air which does escape is used to advantage by maintaining the mainflow of air over the outside of the vane 22.