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. 01, 2011
Filed:
Sep. 13, 2007
Applicants:
Stephen John Bradbrook, Bristol, GB;
Brian Davis, Bristol, GB;
Richard James Wilson, Stoke on Trent, GB;
Inventors:
Stephen John Bradbrook, Bristol, GB;
Brian Davis, Bristol, GB;
Richard James Wilson, Stoke on Trent, GB;
Assignee:
Rolls-Royce PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02C 7/275 (2006.01);
U.S. Cl.
CPC ...
Abstract
A bypass turbofan gas turbine engine is started by an electric starter motor that is mounted directly about a downstream end or upstream of the low pressure spool of the engine. This causes air to be driven by a fan through a bypass duct around the engine casing. Closures close to substantially seal an outlet of the bypass duct, and the air is directed into a combustion chamber of the engine and through the turbines causing the high pressure spool to pick up speed for starting.