US PATENT SUBCLASS 138 / 44
.~.~ Central path

Current as of: June, 1999
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138 /   HD   PIPES AND TUBULAR CONDUITS

37  DF  WITH FLOW REGULATORS AND/OR BAFFLES {3}
40  DF  .~ Restrictors {4}
44.~.~ Central path {1}
45  DF  .~.~.~> Variable restriction

DEFINITION

Classification: 138/44

(under subclass 40) Devices in which the path of flow of the fluid is centrally of the tube.