US PATENT SUBCLASS 373 / 87
.~.~ Crust breaking device

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

60  DF  ARC FURNACE DEVICE {9}
85  DF  .~ For manipulation of the charge or melt (e.g., stirring) {2}
87.~.~ Crust breaking device

DEFINITION

Classification: 373/87

Crust breaking device:

(under subclass 85) Subject matter for poking the top of the furnace charge to fracture incrustation of the molten charge material.