US PATENT SUBCLASS 291 / 36
.~ Vertical plunger

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

25  DF  SAND FEEDERS {8}
36.~ Vertical plunger {1}
37  DF  .~.~> Helical guide

DEFINITION

Classification: 291/36

The plungers pass upwardly into the interior of the sand-hoppers and so are usually combined mixers and discharge-valves.