US PATENT SUBCLASS 451 / 152
.~.~.~.~.~ Screw and nut driver

Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
119  DF  .~ Rotary reciprocating tool {2}
120  DF  .~.~ Cylindrical tool {2}
124  DF  .~.~.~ Rectilinear {13}
150  DF  .~.~.~.~ Rectilinearly reciprocating tool carriage {4}
152.~.~.~.~.~ Screw and nut driver

DEFINITION

Classification: 451/152

Screw and nut driver:

(under subclass 150) Abrading machine wherein the reciprocating motion is effected by relative rotation between coaxial, complimentary threaded members.