초록 ▼

A windmill is disclosed, the windmill including a vertical shaft mounted for rotation about its longitudinal axis, a number of blades spaced circumferentially around the longitudinal axis, and being disposed generally parallel to the axis of rotation of the vertical shaft, and supporting arms extend

A windmill is disclosed, the windmill including a vertical shaft mounted for rotation about its longitudinal axis, a number of blades spaced circumferentially around the longitudinal axis, and being disposed generally parallel to the axis of rotation of the vertical shaft, and supporting arms extending radially outwardly from the vertical shaft for supporting the blades. The windmill also includes a first member connected to an upper end of one of the blades and defining a first surface having a leading edge with respect to the direction of movement of the blade and a trailing edge rearward of the leading edge, the leading edge being lower than the trailing edge. The first surface also includes an inside lateral edge and an outer lateral edge spaced radially outwardly from the inside lateral edge, the inside lateral edge being higher than the outer lateral edge. A second member is connected to the lower end of the blade and defines a second surface, the second surface having a leading edge with respect to the direction of movement of the blade and a trailing surface rearward of the second surface leading edge, the second surface leading edge being higher than the trailing edge. The second surface also includes an inside lateral edge and an outer lateral edge spaced radially outwardly from the second surface inside lateral edge, the second surface inside lateral edge being lower than the second surface outside lateral edge.

대표청구항 ▼

A windmill comprising a vertical shaft mounted for rotation about its longitudinal axis, a number of blades spaced circumferentially around said longitudinal axis, each of said blades being disposed generally parallel to the axis of rotation of the vertical shaft, supporting arms extending radially

A windmill comprising a vertical shaft mounted for rotation about its longitudinal axis, a number of blades spaced circumferentially around said longitudinal axis, each of said blades being disposed generally parallel to the axis of rotation of the vertical shaft, supporting arms extending radially outwardly from the vertical shaft for supporting said blades, and means for increasing the rate of mass flow through the windmill including a member connected to at least one of said blades, said member defining a surface, said surface having a leading edge with respect to the direction of movement of the blade and a trailing edge rearward of said leading edge, said leading edge being lower with respect to said vertical axis than said trailing edge, an inside lateral edge and an outer lateral edge spaced radially outwardly from said inside lateral edge, said inside lateral edge being higher with respect to said vertical axis than said outside lateral edge.