Patent ID: 8440135

Claim:
A metal-transfer conduit extending from an outlet of a molten metal pump base and comprising: (a) a first end configured for connecting to the outlet of the molten metal pump base, the molten metal pump base comprising a pump chamber; (b) a second end opposite the first end; (c) a passage defined between the first end and the second end, the passage tangential to, and in fluid communication with, the pump chamber when the metal-transfer conduit is attached to the pump base, the passage comprising: (i) a first section including a first cross-sectional area; (ii) a second section downstream of the first section and including a second cross-sectional area, the second cross-sectional area being greater than the first cross-sectional area; and (iii) a gas-release opening in one or more of the group consisting of: the first cross-sectional area of the first section and the second cross-sectional area of the second section.