US PATENT SUBCLASS 164 / 360
.~.~.~ Blind riser

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

271  DF  MEANS TO SHAPE METALLIC MATERIAL {12}
349  DF  .~ United particle type shaping surface (e.g., sand, etc.) {9}
359  DF  .~.~ Including means to compensate for shrinkage (e.g., shrink head, etc.) {1}
360.~.~.~ Blind riser

DEFINITION

Classification: 164/360

(under subclass 359) Apparatus wherein the feeding reservoir, i.e., riser, does not extend to the mold surface.

(1) Note. Generally the blind risers are closed to the atmosphere by a cap or plug, however, the blind riser may be vented.

(2) Note. The blind riser may be positioned intermediate the mold cavity proper and the sprue.