US PATENT SUBCLASS 72 / 61
.~.~ Expanding hollow work

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

54  DF  BY APPLICATION OF FLUENT MEDIUM, OR ENERGY FIELD {4}
60  DF  .~ Using fixed die {2}
61.~.~ Expanding hollow work {1}
62  DF  .~.~.~> In circular section die

DEFINITION

Classification: 72/61

Expanding hollow work:

(under subclass 60) Subject matter wherein pressurized fluent material engages the interior surface of work at least a portion of which has a closed periphery cross-section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

58+, for expanding hollow work by a combination of fluent pressure and actuated rigid tool(s).