US PATENT SUBCLASS 164 / 234
.~.~ Including vent or vent forming means

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

159  DF  MEANS TO SHAPE A FORMING SURFACE {8}
228  DF  .~ Means for shaping core (e.g., core boxes, core molds, etc.) {5}
234.~.~ Including vent or vent forming means

DEFINITION

Classification: 164/234

(under subclass 228) Apparatus which includes means defining venting passages in the core box or means for forming vents in the shaped core member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

410, for vents or vent forming apparatus, per se.