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Gas turbine engine aerofoil

  • US 6,874,992 B2
  • Filed: 11/15/2002
  • Issued: 04/05/2005
  • Est. Priority Date: 11/27/2001
  • Status: Expired due to Term
First Claim
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1. An aerofoil for a gas turbine engine comprising an elongated body member having a base and a tip region and having an inner end by means of which the aerofoil may be mounted on a shaft, an outer end, and a plurality of cooling passages comprising a plurality of inlet passages along which cooling air flows from said base towards said tip region of the aerofoil and a plurality of return passages along which cooling air flows from the tip region towards the region of said base of the aerofoil, of said inlet and return passages being connected by a common chamber located within the tip region of the aerofoil, interior wall members defining said inlet and return passages, each of said interior wall members extending from said region of said base toward said tip region end being spaced from said tip region to leave said common chamber unobstructed for the flow of cooling air.

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