US PATENT SUBCLASS 81 / 57.42
.~.~ Direct drive

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
54  DF  .~ Machine {10}
57.42.~.~ Direct drive {4}
57.43  DF  .~.~.~> Flexible
57.44  DF  .~.~.~> Fluid
57.45  DF  .~.~.~> Oblique angle
57.46  DF  .~.~.~> Tangential engagement

DEFINITION

Classification: 81/57.42

(under subclass 54) Wrench or screwdriver wherein the work driving means is in a direct line with respect to the force applying means.