US PATENT SUBCLASS 81 / 447
.~.~.~ Having cooperating threaded element type actuating means

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
436  DF  .~ Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver) {10}
442  DF  .~.~ Inserted portion having relatively movable components {3}
447.~.~.~ Having cooperating threaded element type actuating means

DEFINITION

Classification: 81/447

Having cooperating threaded element type actuating means:

(under subclass 442) Wrench or screwdriver having means for moving the components relative to each other including a threaded, cylindrical rod which is either (a) rotated to shift a mating threaded rider attached to one of the components along its axis, or (b) is attached to one of the components and is shifted by and along the rotational axis of and relative to a mating threaded element which is being rotated.