US PATENT SUBCLASS 29 / 889.61
.~.~.~ Utilizing hollow tube blank

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

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
889  DF  .~ Impeller making {7}
889.6  DF  .~.~ Propeller making {1}
889.61.~.~.~ Utilizing hollow tube blank

DEFINITION

Classification: 29/889.61

Utilizing hollow tube blank:

(under subclass 889.6) Process wherein a propeller blade portion is made from an open cylindrical workpiece.

SEE OR SEARCH CLASS

416, Fluid Reaction Surfaces (i.e., Impellers),

232, and 233 for hollow blade structure.