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Turbine wheel containment shroud for a pneumatically powered turbine engine starter motor

  • US 4,044,550 A
  • Filed: 09/10/1975
  • Issued: 08/30/1977
  • Est. Priority Date: 09/10/1975
  • Status: Expired due to Term
First Claim
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1. A containment shroud for affixation to the exhaust duct of a fluid powered starter motor for a turbine engine, said exhaust duct including an exhaust outlet having an axis and a generally circular opening oriented transversely to said axis, said motor having a turbine wheel mounted within said motor for rotation about an axis substantially coaxial with the axis of said exhaust outlet, said shroud comprising:

  • an annularly shaped member, said member being adapted to be positioned adjacent to and to extend outwardly from the opening of said exhaust outlet, said member having an axis adapted to be oriented substantially coaxially with the axis of said exhaust outlet, said member having at least one aperture opening radially outwardly adjacent the opening of said exhaust outlet for relieveing fluid pressure from within said member and said exhaust outlet, the outer end of said member terminating in and defining an outer opening spaced outwardly from the opening of said exhaust outlet when said member is positioned adjacent said exhaust outlet, andblocking means positioned within and fixed to said annularly shaped member adjacent said outer opening, said blocking means being so oriented and constructed as to permit substantial fluid flow through said outer opening and to prevent egress of said turbine wheel from said outer opening.

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