US PATENT SUBCLASS 81 / 59.1
.~.~ Ball or roller wedge

Current as of: June, 1999
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81 /   HD   TOOLS

52  DF  WRENCH, SCREWDRIVER, OR DRIVER THEREFOR {27}
58  DF  .~ Handle clutched to head {7}
59.1.~.~ Ball or roller wedge

DEFINITION

Classification: 81/59.1

(under subclass 58) Wrench or screwdriver wherein the clutching elements include ball or roller devices arranged between two surfaces so shaped or otherwise related to each other as to wedge the ball or roller therebetween in one direction of movement of the handle with respect to the head to effect driving engagement between the handle and head.