Patent ID: 9689372
Date: 2017-06-27
CPC Classifications: F03D,F05B,H02S,Y02E

Claim:
1. A vertical-axis wind turbine apparatus comprising: a substantially vertically-oriented main shaft; a blade assembly coaxially aligned with and rotatably engaged about the main shaft, the blade assembly providing an at least one blade radially projecting therefrom; the blade assembly having a circumference that comprises a catch portion, wherein the at least one blade catches the wind, and a return portion, wherein the at least one blade carries out its revolution about the main shaft before returning to catch the wind once again; and a housing rotatably engaged with the main shaft and configured for selectively encompassing the blade assembly, the housing comprising: whereby, during use of the apparatus, the second screen is capable of selectively moving into the deployed position upon the occurrence of pre-determined environmental conditions that would otherwise potentially damage the blade assembly.