US PATENT SUBCLASS 164 / 247
.~.~.~ Rotatable or pivotal pattern or pattern section

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

159  DF  MEANS TO SHAPE A FORMING SURFACE {8}
235  DF  .~ Pattern {6}
245  DF  .~.~ To produce undercut {3}
247.~.~.~ Rotatable or pivotal pattern or pattern section

DEFINITION

Classification: 164/247

(under subclass 245) Apparatus wherein the pattern is adapted to be withdrawn solely by nonlinear movement, e.g., screw type pattern.