US PATENT SUBCLASS 81 / 446
.~.~.~.~ Rotatable element located between and camming against components

Current as of: June, 1999
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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}
446.~.~.~.~ Rotatable element located between and camming against components

DEFINITION

Classification: 81/446

Rotatable element located between and camming against components:

(under subclass 443) Camming or wedging element in which the element is rotated about an axis when the components are to be moved relative to each other, the element being located between the components and sliding against the cooperating surface of at least one component when rotated.