US PATENT SUBCLASS 29 / 890.044
.~.~.~ Including conduit expansion or inflation

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

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
890.03  DF  .~ Heat exchanger or boiler making {15}
890.043  DF  .~.~ Tube joint and tube plate structure {1}
890.044.~.~.~ Including conduit expansion or inflation

DEFINITION

Classification: 29/890.044

Including conduit expansion or inflation:

(under subclass 890.043) Process wherein the tube joint or tube plate structure is plastically deformed to increase its size or volume.

(1) Note. Generally, the expansion or inflation is done to perfect the joint structure integrity or to prepare the structure for its particular use.