US PATENT SUBCLASS 81 / 467
.~ Responsive to torque on work

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
467.~ Responsive to torque on work {7}
468  DF  .~.~> With marking mechanism
469  DF  .~.~> Means for regulating motor {1}
471  DF  .~.~> Permanently deformable component
472  DF  .~.~> Relatively movable work contacting components
473  DF  .~.~> Rotatable, coaxial, clutching components {3}
477  DF  .~.~> Work engaging portion attached to and turned by resilient member
478  DF  .~.~> Work engaging portion pivotally or rotatably connected to handle {3}

DEFINITION

Classification: 81/467

Responsive to torque on work:

(under subclass 53) Wrench or screwdriver wherein either (a) the operation of the wrench or screwdriver is stopped, or (b) the tool signals when a selected amount of turning or twisting force (i.e., torque) on the work is exceeded.

SEE OR SEARCH CLASS

73, Measuring and Testing,

862.21+, for wrenches combined with means to measure the load.

464, Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts,

30+, for an overload release coupling; and subclass 25 for a fluid coupling for transmitting a limited pulsating torque.