US PATENT SUBCLASS 72 / 114
.~.~ Helically-grooved tool threadedly engaging work

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

67  DF  BY USE OF TOOL ACTING DURING RELATIVE ROTATION BETWEEN TOOL AND WORK ABOUT INTERNAL CENTER (E.G., GYRATING OR ROTATING TOOL) {10}
112  DF  .~ Tool orbiting or rotating about an axis {8}
114.~.~ Helically-grooved tool threadedly engaging work

DEFINITION

Classification: 72/114

Helically grooved tool threadedly engaging work:

(under subclass 112) Subject matter wherein the tool turns about an axis extending through the work, which tool is provided with an irregularity that could be traced by a point

that runs continuously round and round the axis extending through the work while constantly moving along that axis, and which tool is adapted to slidably engage a portion of the work to rotate and move axially relative to that portion of the work.

(1) Note. Most of the disclosures of this subclass show a device for applying a "blind rivet", that is, a fastener applied to an object from only one side, the operation not requiring a pressure device applied to the opposite side of the object or the fastener.