Pressure-regulating device, transportation vehicle, and...

Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – With means to discharge molten material

Reexamination Certificate

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Details

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).

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