US PATENT SUBCLASS 81 / 54
.~ Machine

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
54.~ Machine {10}
55  DF  .~.~> Bolt-holding {1}
57  DF  .~.~> Gear-operated {9}
57.32  DF  .~.~> Double or duplex
57.33  DF  .~.~> Round work {2}
57.36  DF  .~.~> Multiple work-engaging means
57.37  DF  .~.~> With feed or magazine means {6}
57.38  DF  .~.~> With tensioning means
57.39  DF  .~.~> Step by step
57.4  DF  .~.~> With support {1}
57.42  DF  .~.~> Direct drive {4}

DEFINITION

Classification: 81/54

Wrench or screwdriver having a casing or framework which carries moving mechanical elements, but does not itself move during the operation of the wrench or screwdriver.

(1) Note. A tool which does not claim any machine structure

in detail other than (a) the work-engaging and strain-exerting portion of the tool, or (b) structure which grips or guides the rotatable work when a turning or twisting strain is exerted on the work by the tool, is not considered a machine and is classified on details of the work-engaging and strain-exerting portion in other subclasses under Class 81, subclass 53.

SEE OR SEARCH CLASS

173, Tool Driving or Impacting, appropriate subclass for a means to drive or impact a tool, and particularly

164, for a means to drive a tool about an axis including means to hold and relatively rotate sections of a tool shaft.

408, Cutting by Use of Rotating Axially Moving Tool, appropriate subclasses especially

62+, and 129+ for drilling machines which feed the work or tool along the axis of the tool during operation.