US PATENT SUBCLASS 81 / 436
.~ Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
436.~ Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver) {10}
437  DF  .~.~> Combined with or usable as diverse-type wrench
438  DF  .~.~> Having structure adapting portion or tool for separation
439  DF  .~.~> Including discrete, separately usable inserted portions {1}
441  DF  .~.~> Inserted portion cuts into or deforms cavity
442  DF  .~.~> Inserted portion having relatively movable components {3}
450  DF  .~.~> Inserted portion mounted to pivot or swivel relative to longitudinal axis of handle
451  DF  .~.~> With separate means for guiding or gripping work {3}
459  DF  .~.~> Inserted portion having threaded periphery
460  DF  .~.~> Inserted portion having plural, noncollinear blades (e.g., Phillips)
461  DF  .~.~> Inserted portion having plural, separate, work-engaging projections

DEFINITION

Classification: 81/436

Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver):

(under subclass 53) Wrench or screwdriver in which the work-engaging and strain-exerting portion is intended to be inserted into a cavity (e.g., hole, aperture, etc.) in the surface of the rotatable work.

(1) Note. The portion of the wrench or screwdriver inserted into the cavity is intended to be separable from the cavity of the rotatable work after the turning or twisting strain is applied and is never intended to remain with or become a component of the rotatable work wherein the axis of the cavity is collinear with the rotational axis of the tool.

SEE OR SEARCH THIS CLASS, SUBCLASS:

176+, for a spanner having two spaced projections adapted to engage in spaced recesses in the work to exert a twisting strain thereto.