Patent ID: 9169828
Filing Date: 2015-10-27
Classification: F03D,F05B,Y02E,Y02P

Abstract:
1. A vertical-axis wind turbine, comprising: a shaft defining a rotation axis; a plurality of substantially rigid blades, each of the plurality of substantially rigid blades defining a lower end and an upper end and a blade path extending from the lower end to the upper end, each of the plurality of substantially rigid blades are circularly offset about the rotation axis relative to the lower end and upper end of the same blade, such that each of the plurality of substantially rigid blades present a constant blade chord and a constant thickness-to-chord ratio along the blade path and wherein each of the plurality of substantially rigid blades conforms to a circular arc helical blade shape such that a blade inclination and a blade curvature are substantially constant along each length of the plurality of substantially rigid blades; and a plurality of substantially rigid struts, each of the plurality of substantially rigid struts mechanically coupling at least one of the plurality of substantially rigid blades to the shaft.