US PATENT SUBCLASS 83 / 189
.~.~ Annulus and disc-type tool pair


Current as of: June, 1999
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83 /   HD   CUTTING

178  DF  BY TOOL INSIDE HOLLOW WORK {9}
188  DF  .~ One tool having only rectilinear motion(s) {3}
189.~.~ Annulus and disc-type tool pair {1}
190  DF  .~.~.~> A tool has a sequence of motion in plural paths


DEFINITION

Classification: 83/189

(under subclass 188) Apparatus wherein the cutting means comprises at least one tool pair consisting of an internal edged tool and an external tool provided with a peripheral cutting edge substantially completely surrounding the work, each such tool having a surface lying in a plane common to both tools and along which surface the cutting edge is disposed, so that shearing of the work occurs in the common plane, and in which the peripheral cutting edge of the external tool substantially completely surrounds the tubular work.

(1) Note. One or both of the tools may be active in the cutting operation and the conformation of either element to

the work surface may be modified; as for instance, to provide relieved sections resulting in table portions of such surface, or to result in a progressive cutting operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179, for related cutting means wherein tubular work is prepacked with an internal tool.

186, for annulus and disc type tool pair having compound motion.