US PATENT SUBCLASS 29 / 888.045
.~.~.~.~ With thermal barrier or heat flow provision

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
888  DF  .~ Prime mover or fluid pump making {12}
888.04  DF  .~.~ Piston making {6}
888.044  DF  .~.~.~ With assembly or composite article making {4}
888.045.~.~.~.~ With thermal barrier or heat flow provision

DEFINITION

Classification: 29/888.045

With thermal barrier or heat flow provision:

(under subclass 888.044) Process wherein the manufactured piston has structure especially adapted for (1) preventing heat flow or heat build up, (2) dissipating heat or (3) transferring heat.

SEE OR SEARCH THIS CLASS, SUBCLASS:

890.045+, for a process of making a tube with heat transfer means.