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. 26, 2006
Filed:
Jun. 22, 2004
Applicants:
Christopher M Whitehead, Derby, GB;
Simon Read, Derby, GB;
Inventors:
Christopher M Whitehead, Derby, GB;
Simon Read, Derby, GB;
Assignee:
Rolls-Royce plc, London, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C 11/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
Percussive impacts due to bird strikes upon the hollow fan bladesare a well known problem. These percussive impacts not only deform previous fan blades but also reduce their stiffness. In accordance with the present invention, hollow fan bladesincorporate a cavitywithin which, a matrixwith embedded expandable elements, is located. Thus, upon a percussive impact these expandable elementsare released in order to create an internal pressure within the cavitywhich acts outwardly in order to relieve deformation and also stiffen the bladeas a result of the over pressure within the cavity