US PATENT SUBCLASS 74 / 424.5
.~.~ Spiral

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

640  DF  GEARING {31}
412 R  DF  .~ Directly cooperating gears {8}
424.5.~.~ Spiral {4}
424.6  DF  .~.~.~> Driven rack or shaft
424.7  DF  .~.~.~> Screw
424.8 R  DF  .~.~.~> Screw and nut {6}
425  DF  .~.~.~> Worm {3}

DEFINITION

Classification: 74/424.5

(under subclass 412) Gearings of the spiral type.