US PATENT SUBCLASS 72 / 31.06
.~ Tube diameter resizing

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

31.01  DF  WITH INDICATION OF CONDITION OR POSITION OF WORK, PRODUCT, OR MACHINE ELEMENT (E.G., BROKEN TOOL ALARM, ETC.) {6}
31.06.~ Tube diameter resizing

DEFINITION

Classification: 72/31.06

Tube diameter resizing:

(under subclass 31.01) Subject matter wherein the work

comprises a hollow elongate cylinder having a cross section perpendicular to the length thereof and the information relates to a change in girth of the cross section without substantially altering the shape thereof.