US PATENT SUBCLASS 291 / 28
.~ Oscillatory

Current as of: June, 1999
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291 /   HD   TRACK SANDERS

25  DF  SAND FEEDERS {8}
28.~ Oscillatory {3}
29  DF  .~.~> Cup
30  DF  .~.~> Hopper
31  DF  .~.~> Spout cutoff

DEFINITION

Classification: 291/28

The sand releasing and stirring members have an angular to-and-fro movement about axes at right angles to the plane of rotation. The releasing members are hinged doors, cylindrical segments, recessed or smooth, or of the perforated-plug-valve type.