Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – Spray refining means
Reexamination Certificate
2006-12-19
2009-02-03
McNeil, Jennifer (Department: 4162)
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
Spray refining means
C075S343000
Reexamination Certificate
active
07485254
ABSTRACT:
A metal powder production apparatus includes a supply part for supplying molten metal and a nozzle having a first member and a second member by which an orifice for injecting water is defined. The first member has a gradually reducing inner diameter portion. A heat insulating layer for cutting off radiant heat emitted from the molten metal is formed on the gradually reducing inner diameter portion of the first member. the nozzle is configured to ensure that the gradually reducing inner diameter portion is prevented, under an action of the heat insulating layer, from being thermally deformed by the radiant heat of the molten metal but a region of the first member near the orifice is thermally deformed in such a direction as to reduce a size of the orifice by absorbing the radiant heat of the molten metal, whereby the orifice can be restrained from being enlarged by the pressure of the water passing through the orifice.
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patent: 5366204 (1994-11-01), Gigliotti, Jr. et al.
patent: 5656061 (1997-08-01), Miller et al.
patent: 2 155 048 (1985-09-01), None
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Search Report issued in corresponding European application.
Nakabayashi Koei
Shimura Tokihiro
Tanaka Mitsutoyo
Tanaka Yoshinari
Corno James
Harness & Dickey & Pierce P.L.C.
McNeil Jennifer
Seiko Epson Corporation
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