US PATENT SUBCLASS 81 / 444
.~.~.~.~ Axially shiftable element located between and wedging against components

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}
443  DF  .~.~.~ Having camming or wedging element for moving components {2}
444.~.~.~.~ Axially shiftable element located between and wedging against components {1}
445  DF  .~.~.~.~.~> With threaded surface for cooperating with mating tool structure

DEFINITION

Classification: 81/444

Axially shiftable element located between and wedging against components:

(under subclass 443) Camming or wedging element in which the element is shifted in its entirety along a line parallel to the axis about which the wrench or screwdriver turns or twists when exerting strain on the work, the element being located between the components and sliding against the cooperating surface of at least one component when shifted parallel to the axis.