US PATENT SUBCLASS 451 / 12
.~.~ And use of moving abutment

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}
12.~.~ And use of moving abutment {1}
13  DF  .~.~.~> Moved by cam

DEFINITION

Classification: 451/12

And use of moving abutment:

(under subclass 11) Subject matter combined with use of means which shifts the position of a movement blocking member relative to the tool or work holder.