US PATENT SUBCLASS 72 / 391.8
.~.~.~.~ Helically ribbed tool

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

Internet Version by PATENTEC © 1999      Terms of Use


72 /   HD   METAL DEFORMING

380  DF  BY RELATIVELY MOVABLE OFFSET TOOL-FACES (E.G., FOR BENDING OR DRAWING) {4}
386  DF  .~ With tool motion in fixed path {3}
391.2  DF  .~.~ Concentric or telescoped tools {1}
391.4  DF  .~.~.~ Tool inside hollow fastener {2}
391.8.~.~.~.~ Helically ribbed tool

DEFINITION

Classification: 72/391.8

Helically ribbed tool:

(under subclass 391.4) Device wherein the tool passing at least through a portion of the workpiece is screw threaded along its axis and is intended to screw fit with a cooperating mating surface of the workpiece.

(1) Note. The tool of this subclass is brought into engagement with the workpiece by relative rotation therewith, however deformation is effected by straight line movement of the tool with respect to the work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114, for similar structure wherein deformation of the workpiece is effected by the action of the tool while turning about its axis with respect the workpiece.