US PATENT SUBCLASS 451 / 16
.~.~.~ Ratchet and pawl drive

Current as of: June, 1999
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451 /   HD   ABRADING

1  DF  PRECISION DEVICE OR PROCESS - OR WITH CONDITION RESPONSIVE CONTROL {7}
11  DF  .~ With feeding of tool or work holder {6}
14  DF  .~.~ Screw actuated {2}
16.~.~.~ Ratchet and pawl drive {4}
17  DF  .~.~.~.~> Sizing gauge controlled
18  DF  .~.~.~.~> Cam actuated
19  DF  .~.~.~.~> Hydraulically driven
20  DF  .~.~.~.~> Table dog actuated

DEFINITION

Classification: 451/16

Ratchet and pawl drive:

(under subclass 14) Subject matter including use of a circular toothed wheel (i.e., ratchet wheel) which is held in position or propelled by a feather (i.e., pawl), which wheel serves to turn the screw.