US PATENT SUBCLASS 164 / 256
.~.~ Enclosed system including a receptacle and mold

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.~.~ Enclosed system including a receptacle and mold {2}
257  DF  .~.~.~> Vacuum or suction means for feeding molten metal into charging chamber receptacle
258  DF  .~.~.~> Including melting chamber receptacle

DEFINITION

Classification: 164/256

(under subclass 254) Apparatus which includes means for directly applying a vacuum or suction in a closed system encompassing a receptacle and a casting mold.

(1) Note. The closed system may include a melting furnace, an intermediate charging chamber and a casting chamber and the vacuum or suction may be applied in all or any one of them.