US PATENT SUBCLASS 409 / 322
.~.~.~ With fluid-driven bed

Current as of: June, 1999
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409 /   HD   GEAR CUTTING, MILLING, OR PLANING

288  DF  PLANING {14}
317  DF  .~ With means to relatively infeed cutter and work {6}
321  DF  .~.~ Reciprocating work infeed means {4}
322.~.~.~ With fluid-driven bed

DEFINITION

Classification: 409/322

With fluid-driven bed:

(under subclass 321) Apparatus including means to cause the carriage to move relative to the base to perform the shaping operation, which means is adapted to derive carriage moving force from the action of a flowable medium acting against a surface thereof.