04093402 is referenced by 21 patents and cites 8 patents.

A propeller for a wind mill comprising a rotable supported hub with at least one mainly radially extending blade having a cross section in the shape of a "wing profile", each blade being provided with at least one auxiliary blade with a cross section in the shape of wing profile and being positioned such that said auxiliary blade will generate a "ventury effect" by which a part of the fluid, which normally should pass outside the propeller disc area, is drawn into the propeller.

Title
Propeller or a set of wings for a wind mill
Application Number
5/740090
Publication Number
4093402
Application Date
November 9, 1976
Publication Date
June 6, 1978
Inventor
Theodoor Van Holten
Thorbeckelaan 66, Pijnacker
NL
Agent
Paul & Paul
IPC
F03D 1/06
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