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US 10,947,980 B2Granted
Molten metal rotor with hardened blade tips
AssigneeMolten Metal Equipment Innovations, LLC
InventorPaul V. Cooper
Life of this patent
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Abstract
Embodiments of the invention are directed to a rotor for use in molten metal and devices including the rotor. The rotor has a rotor body and blades, wherein each blade includes a tip that is at least twice as hard as the rotor body.
Claims25
A rotor for use in molten metal, the rotor comprising a top surface and:
- (a) a graphite body portion that includes a plurality of rotor blade portions, wherein each rotor blade portion has (i) an upper surface that forms part of the top surface of the rotor, (ii) a leading face, (iii) a recess, and (iv) a back channel, wherein the back channel:
- (A) is behind the recess, (B) is in communication with the recess, and (C) extends to the top surface of the rotor;
- and
- (b) a hardened tip on a leading edge of each rotor blade, wherein the hardened tip has an extension that is positioned in the recess and that is also positioned in the back channel, and the hardened tip forms part of the top surface of the rotor and part of the leading face, and the hardened tip comprises material at least twice as hard as the graphite body portion.
1 more element
Dependencies are inferred from the claim text.