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:
Jul. 31, 2018
Filed:
Oct. 13, 2015
Applicant:
Rolls-royce Plc, London, GB;
Inventors:
Michael Georg Kozuch, Derby, GB;
Zahid Muhammad Hussain, Derby, GB;
Kevin Mark Britchford, Derby, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 17/10 (2006.01); F01D 5/02 (2006.01); F01D 25/12 (2006.01); F16K 1/22 (2006.01); F02K 3/075 (2006.01); F02C 9/18 (2006.01); F02C 6/08 (2006.01);
U.S. Cl.
CPC ...
F01D 17/105 (2013.01); F01D 5/02 (2013.01); F01D 25/12 (2013.01); F02C 6/08 (2013.01); F02C 9/18 (2013.01); F02K 3/075 (2013.01); F16K 1/22 (2013.01);
Abstract
A bleed valve for a gas turbine engine, the bleed valve comprising: an inlet coupled to an air source; and an outlet coupled to an air sink. The bleed valve also comprises a first stage of flow area modulation between the inlet and the outlet. Also a second stage of flow area modulation between the first stage and the outlet. The pressure can be equalized between the first and second stages. There is also an arrangement comprising a plurality of bleed valves and a controller to control the flow areas of at least one of the first and second stages of each bleed valve.