US PATENT SUBCLASS 29 / 889.4
.~.~ Centrifugal blower or fan


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}
889.4.~.~ Centrifugal blower or fan


DEFINITION

Classification: 29/889.4

Centrifugal blower or fan:

(under subclass 889) Process for manufacturing an impeller of the type wherein the fluid flow discharge is substantially outwardly in radial direction from the central portion of the rotor.

SEE OR SEARCH CLASS

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

178, for perimetric blading extending axially between annular members (e.g., squirrel cage type, etc.).