04247253 is referenced by 55 patents and cites 3 patents.

Wind turbines are largely divided into vertical axis wind turbines and propeller (horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with rotational speed control systems. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotating shaft by keeping the blade span-wise direction in parallel with the shaft and being provided with aerodynamic control elements operating manually or automatically to control the rotational speed of the turbine.

Title
Vertical axis wind turbine
Application Number
5/922292
Publication Number
4247253
Application Date
July 6, 1978
Publication Date
January 27, 1981
Inventor
Yoshio Kato
Tokyo
JP
Yoshio Shimizu
Sagamihara
JP
Kazuichi Seki
Isehara
JP
Agent
Koda and Androlia
Assignee
Gakko Hojin Tokai University
JP
IPC
F03D 7/06
View Original Source