US PATENT SUBCLASS 291 / 7
.~ Gravity conversion

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

3  DF  FLUID DELIVERY {7}
7.~ Gravity conversion {3}
8  DF  .~.~> Bypass
9  DF  .~.~> Horizontal trap axis
10  DF  .~.~> Vertical trap axis

DEFINITION

Classification: 291/7

Supplemental attachments for fluid sand-delivery apparatus, so that in case of absence of or failure of fluid-pressure or at will a gravity sand-feed may be thrown into operation.