US PATENT SUBCLASS 164 / 257
.~.~.~ Vacuum or suction means for feeding molten metal into charging chamber receptacle

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

253  DF  MEANS TO APPLY VACUUM DIRECTLY TO WORK OR TO HOLD OR MANIPULATE SHAPING MEANS {1}
254  DF  .~ Means applying vacuum or suction directly to molten casting material {2}
256  DF  .~.~ Enclosed system including a receptacle and mold {2}
257.~.~.~ Vacuum or suction means for feeding molten metal into charging chamber receptacle

DEFINITION

Classification: 164/257

(under subclass 256) Apparatus with vacuum or suction means for feeding the molten metal into the charging chamber receptacle.

(1) Note. The vacuum or suction effect may be created by a pressure cylinder which operates to force the molten metal from the charging receptacle to the mold.