US PATENT SUBCLASS 81 / 477
.~.~ Work engaging portion attached to and turned by resilient member

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
467  DF  .~ Responsive to torque on work {7}
477.~.~ Work engaging portion attached to and turned by resilient member

DEFINITION

Classification: 81/477

Work engaging portion attached to and turned by resilient member:

(under subclass 467) Wrench or screwdriver in which the work-engaging portion is attached to a resilient structural member, which either (a) remains rigid and transmits force from the source to the portion when the torque on the work is below the selected value, or (b) bends and prevents or signal the transmittal of excessive force when the torque on the work exceeds the selected value.