US PATENT SUBCLASS 291 / 3
FLUID DELIVERY

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

3FLUID DELIVERY {7}
4  DF  .~> Smoke and cinder
5  DF  .~> Reversing
6  DF  .~> Movable trap valve
7  DF  .~> Gravity conversion {3}
11.1  DF  .~> Including sand trap {2}
12  DF  .~> Blast-nozzle cleaners
13  DF  .~> Air ports and screens

DEFINITION

Classification: 291/3

Devices in which the sand is displaced and propelled or after gravity release is propelled through the delivery-pipe by either air, steam, water, or engine exhaust-gases.

SEE OR SEARCH CLASS

222, Dispensing,

630+, for dispensers involving fluid flow discharge.

406, Conveyors: Fluid Current.

451, Abrading,

75+, for a sandblast apparatus, generally.