Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – With means to discharge molten material
Reexamination Certificate
2003-12-01
2008-11-18
King, Roy (Department: 1793)
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
With means to discharge molten material
C266S089000, C266S143000, C266S144000, C266S207000, C266S208000, C266S239000, C266S269000, C222S591000, C222S594000, C222S595000, C222S603000
Reexamination Certificate
active
07452498
ABSTRACT:
A pressure controlling apparatus controls a pressure in a container capable of storing a molten metal and supplying the molten metal to an outside using a pressure difference and includes: a supplying portion for supplying a compressed gas to be supplied to the container; a flow passage for supplying the compressed gas from the supplying portion to the container; a first switching valve, being inserted into the passage, capable of manually switching a first mode that enables the passage of the gas between the supplying portion side and the container side and a second mode that enables the passage of the gas between the container side and the outside; an exhausting portion for exhausting a gas from the container; and a second switching valve for switching a pressure applying mode for applying a pressure to the container and an exhausting mode for exhausting the gas from the container.
REFERENCES:
patent: 3-31063 (1991-03-01), None
patent: 2002-263828 (2002-09-01), None
patent: 2002-316255 (2002-10-01), None
patent: 2002-316256 (2002-10-01), None
patent: 2002-316258 (2002-10-01), None
patent: 3492675 (2004-02-01), None
Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 89474/1989 (Laid-open No. 31063/1991) Mar. 26, 1991, Fig.1; pp. 7 to 10 (Family: none).
International Search Report mailed on Mar. 2, 2004.
PRC PO Office Action, App. No. 2066101445332, Nov. 16, 2007 (1 page).
Abe Tsuyoshi
Ichikawa Narumi
Iyoda Koji
Mizuno Hitoshi
Noguchi Kenji
Hoei Shokai Co., Ltd.
King Roy
Rader & Fishman & Grauer, PLLC
Zheng Lois L.
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