(19)
(11) EP 2 573 322 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.05.2015 Bulletin 2015/21

(43) Date of publication A2:
27.03.2013 Bulletin 2013/13

(21) Application number: 12185422.8

(22) Date of filing: 21.09.2012
(51) International Patent Classification (IPC): 
F01D 5/14(2006.01)
 F01D 5/16(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 23.09.2011 US 201113241756

(71) Applicant: United Technologies Corporation
Hartford, CT 06101 (US)

(72) Inventors:
  • McKaveney, Christopher S.
    East Hartford, CT Connecticut 06118 (US)
  • Wang, Letain
    Amston, CT Connecticut 06231 (US)

(74) Representative: Hull, James Edward 
Dehns St. Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) Fan blade


(57) A fan blade (20) has a main body (28) extending between a leading edge (21) and a trailing edge (22). Channels (30) are formed into the main body (28) from at least one open side. A plurality of ribs (28) extend across the main body (28) intermediate the channels (30). The fan blade (20) has a dovetail (24) and an airfoil (18) extending radially outwardly from the dovetail (24). The ribs (26) have a thickness defined as measured generally from the leading edge (21) toward the trailing edge (22). A thickness of at least one of the ribs (26) is generally thicker adjacent radially inner ends (42) and becomes thinner moving in a radially outward direction.







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