US PATENT SUBCLASS 409 / 21
.~.~.~.~.~.~ Vertically

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

1  DF  GEAR CUTTING {11}
10  DF  .~ Gear tooth shape generating {7}
11  DF  .~.~ Hobbing {5}
17  DF  .~.~.~ Including infeed means {2}
18  DF  .~.~.~.~ To infeed along axis of work rotation {1}
19  DF  .~.~.~.~.~ Infeed of cutter {2}
21.~.~.~.~.~.~ Vertically

DEFINITION

Classification: 409/21

Vertically:

(under subclass 19) Apparatus wherein the workpiece is supported to turn about an axis extending generally up and down with respect to the earth and wherein the cutting tool is moved relative to the support and relative to the workpiece along the axis to effect the cutting operation.