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:
Sep. 06, 2016
Filed:
Jun. 11, 2013
Applicant:
Rolls-royce Plc, London, GB;
Inventors:
Kenneth John Mackie, Derby, GB;
Kenneth Franklin Udall, Ilkeston, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C 11/08 (2006.01); B64C 11/06 (2006.01); F01D 5/30 (2006.01); B64D 27/00 (2006.01);
U.S. Cl.
CPC ...
B64C 11/08 (2013.01); B64C 11/06 (2013.01); B64D 2027/005 (2013.01); F01D 5/3023 (2013.01); Y02T 50/66 (2013.01);
Abstract
This invention relates to a blade assembly comprising: a hub which is rotatable about an axis; at least one blade having an aerofoil portion and a root, wherein the root is coupled to the hub using a primary retention device which prevents radial separation of the root and hub in normal use; and, a secondary retention device which comprises an annular catcher having a restriction through which the root portion cannot radially pass, the restriction being located radially outwardly and radially spaced from the root part during use.