Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2006-08-22
2006-08-22
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C029S889720, C029S889721, C029S889722, C428S293400, C264S035000, C264S257000, C264S259000, C264S267000
Reexamination Certificate
active
07093359
ABSTRACT:
A method of manufacturing a composite structure uses a layer of an insulating material (22) as a mold for forming a substrate of a ceramic matrix composite (CMC) material (24). The insulating material may be formed in the shape of a cylinder (10) with the CMC material wound on an outer surface (14) of the cylinder to form a gas turbine combustor liner (20). Alternatively, the insulating material may be formed in the shape of an airfoil section (32) with the CMC material formed on an inside surface (36) of the insulating material. The airfoil section may be formed of a plurality of halves (42, 44) to facilitate the lay-up of the CMC material onto an easily accessible surface, with the halves then joined together to form the complete composite airfoil. In another embodiment, a box structure (102) defining a hot gas flow passage (98) is manufactured by forming insulating material in the shape of opposed airfoil halves (104) joined at respective opposed ends by platform members (109). A layer of CMC material (107) is then formed on an outside surface of the insulating material. A number of such composite material box structures are then joined together to form a vane ring (100) for a gas turbine engine.
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WO 2002/27145 (Derwent Abstract) Apr. 4, 2002.
Albrecht Harry A.
Butner Steven C.
Lane Jay Edgar
Merrill Gary Brian
Morrison Jay A.
Bryant David P.
Siemens Westinghouse Power Corporation
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