US PATENT SUBCLASS 74 / 441
.~.~.~.~ Screw and nut

Current as of: June, 1999
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74 /   HD   MACHINE ELEMENT OR MECHANISM

640  DF  GEARING {31}
434  DF  .~ Rotary bodies {5}
439  DF  .~.~ Sectional {9}
440  DF  .~.~.~ Backlash take-up {1}
441.~.~.~.~ Screw and nut

DEFINITION

Classification: 74/441

(under subclass 440) Devices, the gears being of the screw and nut type.