Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2006-10-10
2006-10-10
Trieu, Thai-Ba (Department: 3748)
Metal working
Method of mechanical manufacture
Impeller making
C029S889710, C029S557000, C060S602000
Reexamination Certificate
active
07117596
ABSTRACT:
A shaft portion is processed to have a desired diametrical thickness by rolling in place of cutting so that a cutting operation requiring much time may be eliminated from a manufacturing process of the adjustable blade. A shaft elongation and a sharp edge caused by the rolling can be inhibited to thereby eliminate an additional cutting operation conventionally performed for correcting the shaft elongation and the sharp edge. In particular, a metal shaped material for an adjustable blade integrally provided with a blade portion and a shaft portion is formed to have a shape and a size close to those of the desired adjustable blade. In forming the shaft portion, a shaft portion forming section of the shaped material is rolled to have a desired diametrical thickness.
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Akita Fine Blanking Co., Ltd.
Trieu Thai-Ba
Wenderoth , Lind & Ponack, L.L.P.
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