Patent ID: 9435343
Filing Date: 2016-09-06
CPC Classification: F04D,F17D,Y10T

Claim Text:
1. A gas-transfer foot for a molten metal pump having a pump base with a top surface, a bottom surface, and a notch in the bottom surface, the gas-transfer foot configured to be received in the notch and comprising: (a) a top surface and a gas inlet port through which gas passes into the foot, the gas-inlet port in the top surface and configured to attach to a gas-transfer conduit; and (b) a first end having a first outer cross-sectional area, and a second section that narrows from the first outer cross-sectional area to a second outer cross-sectional area, the first outer cross-sectional area being larger than the second outer cross-sectional area, and the gas-release port being formed at an end of the second section; wherein when the gas-transfer foot is received in the notch the gas-release port can transfer gas into a flow of molten metal moving through the pump base.