초록 ▼

A multi-vane windmill rotating in a horizontal plane on a vertical shaft includes frame supported fabric type vanes with the frame hingedly attached at one end to support arms to swing closed and catch the wind in one position and to swing open under centrifugal and wind forces in another position w

A multi-vane windmill rotating in a horizontal plane on a vertical shaft includes frame supported fabric type vanes with the frame hingedly attached at one end to support arms to swing closed and catch the wind in one position and to swing open under centrifugal and wind forces in another position when coming into the wind to reduce air resistance. Vanes are releasably attached in part to the frame for support in operating position and otherwise slidably secured thereto so as to release and collapse on the frame under extreme wind pressures when the frame is closed and thus spill the wind. Stops on the support arms provide a limit of movment of the vane frames. A second embodiment of the vanes includes two overlapping sections normally held in overlapped or closed position by yielding means that permit the sections to separate under high winds to provide an air passageway through the vane.

대표청구항 ▼

A windmill comprising: a support base, a vertical shaft mounted to said base for rotation abouts its longitudinal axis, a plurality of pairs of vertically spaced parallel horizontal arms defining respective upper and lower arms each with respective inner and outer ends, means securing each pair of a

A windmill comprising: a support base, a vertical shaft mounted to said base for rotation abouts its longitudinal axis, a plurality of pairs of vertically spaced parallel horizontal arms defining respective upper and lower arms each with respective inner and outer ends, means securing each pair of arms at respective inner ends to said shaft so as to extend radially therefrom in equidistant relationship about the perimeter of said shaft, a respective substantially rectangular open frame disposed between each pair of arms and hingedly secured thereto near said respective outer ends whereby said frame can swing to a closed position of alignment with said arms and to an open position out of alignment with said arms, a respective radial stop member on said shaft in alignment with respective pairs of arms and disposed to intersect the path of movement of said respective frames so as to limit said movement in one direction, a respective vane having top and bottom ends and releasably secured at said top end to and within the confines of said respective frames, and means responsive to extreme wind forces acting on said vanes to effect their release at said top end from said frame whereby said vanes collapse by gravity for reducing the wind catching capability of said vanes when said frame is in closed position.