US PATENT SUBCLASS 291 / 43
.~.~ Fluid

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

41  DF  SAND-DELIVERY PIPE {4}
42  DF  .~ Cleaners {1}
43.~.~ Fluid

DEFINITION

Classification: 291/43

A current of air or steam is blown through the delivery-pipe. In case of a delivery-pipe in fluid sanding system the cleaning-current is additional to the sand, air, or steam blast for moving the sand.