US PATENT SUBCLASS 72 / 370.06
.~.~.~ Expanding tube

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

362  DF  PROCESS {8}
367.1  DF  .~ Tube making or reshaping {11}
370.01  DF  .~.~ Comprising use of internal tool {4}
370.06.~.~.~ Expanding tube {2}
370.07  DF  .~.~.~.~> Sleeve expanded in passage
370.08  DF  .~.~.~.~> Expanding internal tool

DEFINITION

Classification: 72/370.06

Expanding tube:

(under subclass 370.01) Process in which the transverse dimension of the tube* is increased.