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. 08, 2019
Filed:
Apr. 30, 2019
Applicant:
Rolls-royce Plc, London, GB;
Inventors:
Assignee:
ROLLS-ROYCE PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 5/14 (2006.01); F04D 29/38 (2006.01); F01D 5/28 (2006.01); F04D 29/32 (2006.01);
U.S. Cl.
CPC ...
F01D 5/141 (2013.01); F01D 5/288 (2013.01); F04D 29/384 (2013.01); F04D 29/324 (2013.01); F05B 2240/301 (2013.01); F05D 2220/327 (2013.01); F05D 2240/301 (2013.01); F05D 2240/303 (2013.01); F05D 2300/121 (2013.01); F05D 2300/133 (2013.01); F05D 2300/603 (2013.01);
Abstract
A gas turbine engine has a fan tip air angle and/or a fan blade tip air angle in a defined range to achieve improved over all performance, taking into account fan operability and/or bird strike requirements as well as engine efficiency. The defined ranges of fan tip air angle and/or a fan blade tip air angle may be particularly beneficial for gas turbine engines in which the fan is driven by a turbine through a gearbox.