US PATENT SUBCLASS 72 / 75
.~ Spherical tool

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}
75.~ Spherical tool

DEFINITION

Classification: 72/75

Spherical tool:

(under subclass 67) Subject matter wherein the tool is an element that is circular in all cross sections.

(1) Note. Many disclosures in this subclass show a ball (or a plurality of balls) forced along the inside of a tube.