Method for manufacturing constituents of a hollow blade by...

Metal working – Method of mechanical manufacture – Impeller making

Reexamination Certificate

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C029S889000, C029S889230, C029S889710, C029S889720, C416S21300R, C416S232000, C416S239000

Reexamination Certificate

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07578059

ABSTRACT:
In a method for manufacturing a hollow blade for a turbomachine, the blade is made from a preform derived from external primary parts. Each primary part comprising a root part is formed by flattening a blank cut out from a ring with a large diameter provided with a protuberance, in order to reduce costs.

REFERENCES:
patent: 2266858 (1941-12-01), Gehret
patent: 2633776 (1953-04-01), Schenk
patent: 3858428 (1975-01-01), Thompson
patent: 4012168 (1977-03-01), Spellman
patent: 4529452 (1985-07-01), Walker
patent: 5636440 (1997-06-01), Bichon et al.
patent: 5711068 (1998-01-01), Salt
patent: 6077002 (2000-06-01), Lowe
patent: 2001/0022023 (2001-09-01), Wallis
patent: 1 338 353 (2003-08-01), None

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