US PATENT SUBCLASS 81 / 449
.~.~.~.~ Biased component rotated about axis collinear to rotational axis of tool

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}
448  DF  .~.~.~ Having resilient or spring biased component {1}
449.~.~.~.~ Biased component rotated about axis collinear to rotational axis of tool

DEFINITION

Classification: 81/449

Biased component rotated about axis collinear to rotational axis of tool:

(under subclass 448) Wrench or screwdriver wherein the spring-biased component is rotated by the spring about an axis which is collinear to the axis about which the tool

turns or twists when exerting strain on the work.