US PATENT SUBCLASS 266 / 222
.~.~.~.~.~ Concentric flow paths

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

200  DF  MEANS FOR MELTING OR VAPORIZING METAL OR TREATING LIQUEFIED METAL {19}
216  DF  .~ By means introducing treating material {1}
217  DF  .~.~ Gaseous treating material {2}
218  DF  .~.~.~ Having fluid inlet formed in vessel wall, e.g., tuyere {5}
221  DF  .~.~.~.~ By means to introduce diverse material {1}
222.~.~.~.~.~ Concentric flow paths

DEFINITION

Classification: 266/222

(under subclass 221) Device wherein the adding means has a plurality of coaxial flow paths.