US PATENT SUBCLASS 451 / 427
.~.~.~ Nut-and-screw-type drive

Current as of: June, 1999
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451 /   HD   ABRADING

415  DF  ATTACHMENT {13}
424  DF  .~ Roll or wheel abrader {3}
426  DF  .~.~ Reciprocating tool {1}
427.~.~.~ Nut-and-screw-type drive

DEFINITION

Classification: 451/427

Nut-and-screw-type drive:

(under subclass 426) Attachment employing means to cause the abrasive tool to reciprocate comprising a helical male member and a cooperating helical female member, one of which rotates with respect to the other.