US PATENT SUBCLASS 55 / 456
.~.~ Helical vane or baffle within flow conduit

Current as of: June, 1999
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55 /   HD   GAS SEPARATION

434  DF  DEFLECTOR {10}
447  DF  .~ Fixed gas whirler or rotator means {9}
456.~.~ Helical vane or baffle within flow conduit {1}
457  DF  .~.~.~> Between gas flow path wall and central core

DEFINITION

Classification: 55/456

(under subclass 447) Apparatus wherein said member is situated within a gas flow passage and is twisted or turned about its axis.