(under subclass 223) Apparatus comprising (1) fairing structure supported adjacent the inner end of the blade or (2) the specific shape or construction of the lower portion of the blade intermediate the reaction surface and the root, as in Fig. II in the Class Definition of this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
234, for impeller blading integral with and smoothly blended into the carrier or which comprises, in effect, a shaped hub.
248, for subject matter directed to blade root structure or to a root block, the impeller blade being either nominally recited or not claimed.
