Refractory metal core for integrally cast exit trench

(19)

(11)

EP 2 286 938 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.02.2015 Bulletin 2015/09

(43)	Date of publication A2:
	23.02.2011 Bulletin 2011/08

(21)	Application number: 10251009.6

(22)	Date of filing: 26.05.2010

(51)

International Patent Classification (IPC):

B22C 9/10^(2006.01)

F01D 5/18^(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 SE SI SK SM TR
	Designated Extension States:
	BA ME RS

(30)

Priority:

27.07.2009 US 509608

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

(72)	Inventor:
	Hudson, Eric A. Harwinton, CT 06791 (US)

(74)	Representative: Leckey, David Herbert
	Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)

(54)	Refractory metal core for integrally cast exit trench

(57) A refractory metal core (10') for use in casting a turbine engine part (12') has a main portion (16') and a plurality of tabs (18') extending from the main portion (16'). An end portion (22') has a first edge which joins together the plurality of tabs (18') and a second edge, opposed to the first edge, located internally of an exterior boundary (14') of the cast part (12').

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