Dispensing apparatus and method

Metallurgical apparatus – Process – Plugging or tapping

Reexamination Certificate

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Details

C266S239000, C222S595000

Reexamination Certificate

active

06841120

ABSTRACT:
An apparatus for dispensing a molten material from a reservoir of molten material includes a dispensing chamber in communication with the reservoir and a first valve adapted to regulate communication of the dispensing chamber with the reservoir. A riser communicates with the dispensing chamber for dispensing the molten material, and a second valve is adapted to regulate communication of the riser with the dispensing chamber. Also disclosed is a method for reducing the inclusion of oxides in a casting of a molten metal.

REFERENCES:
patent: 3050794 (1962-08-01), Holz
patent: 3430685 (1969-03-01), Drugowitsch
patent: 3652073 (1972-03-01), Lewis
patent: 5657812 (1997-08-01), Walter et al.
patent: 5700422 (1997-12-01), Usui et al.
patent: 6103182 (2000-08-01), Campbell
patent: 26 48 730 (1977-05-01), None
patent: 0 506 025 (1992-09-01), None
patent: 0 812 639 (1997-12-01), None
patent: 0901854 (1999-03-01), None
patent: 1171295 (1969-11-01), None
patent: WO 9833612 (1998-08-01), None

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