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:
Aug. 02, 2022
Filed:
Apr. 15, 2019
Applicant:
Ratier-figeac Sas, Figeac, FR;
Inventors:
Bruno Seminel, Figeac, FR;
Stanislas Tutaj, Faycelles, FR;
Assignee:
RATIER-FIGEAC SAS, Figeac, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C 11/20 (2006.01); B64C 3/18 (2006.01); B29D 99/00 (2010.01); F01D 5/14 (2006.01); B29K 63/00 (2006.01); B29K 105/08 (2006.01);
U.S. Cl.
CPC ...
B64C 11/20 (2013.01); B29D 99/0025 (2013.01); B64C 3/185 (2013.01); F01D 5/147 (2013.01); B29K 2063/00 (2013.01); B29K 2105/089 (2013.01); F05D 2230/31 (2013.01);
Abstract
A method of manufacturing a spar for a propeller blade comprises forming a hollow inner core from a composite material, and then braiding carbon fibres around the inner core to form an outer spar structure. The hollow inner core may be formed using an inflatable bladder and a mould defining an outer shape of the spar. This construction avoids the need for a foam core to be provided within the spar.