US PATENT SUBCLASS 164 / 216
.~.~.~ Screw thread pattern

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

159  DF  MEANS TO SHAPE A FORMING SURFACE {8}
213  DF  .~ Including means for separating forming surface from shaping means {9}
215  DF  .~.~ Means rotatably withdrawing pattern {1}
216.~.~.~ Screw thread pattern

DEFINITION

Classification: 164/216

(under subclass 215) Apparatus wherein the pattern member has a helical thread or groove.

SEE OR SEARCH CLASS

249, Static Molds,

59, for nonsand type static molds which produce a helical or threaded type product.