초록 ▼

A vertical axis windmill wherein the blades pivot between a power delivery and a recovery position with air gates associated with a non-rotating chamber containing the windmill acting to preclude airflow over the blades while in the recovery position. The blades either include chambers therein confi

A vertical axis windmill wherein the blades pivot between a power delivery and a recovery position with air gates associated with a non-rotating chamber containing the windmill acting to preclude airflow over the blades while in the recovery position. The blades either include chambers therein configured to receive a fluid moveable between the chambers as dictated by rotational speed of the windmill, or the blades are connected in pairs with elevational motion of one blade to a power delivery position assists the other blade of the pair in returning from the power delivery position to the recovery position.

대표청구항 ▼

A windmill comprising: a power transfer shaft defining a vertical axis of rotation for the windmill with respect to the Earth\s surface; a plurality of blades, the blades being power transferringly attached to the power transfer shaft and configured to pivot between a power delivery position and a r

A windmill comprising: a power transfer shaft defining a vertical axis of rotation for the windmill with respect to the Earth\s surface; a plurality of blades, the blades being power transferringly attached to the power transfer shaft and configured to pivot between a power delivery position and a recovery position about an axis generally perpendicular to the vertical axis as defined by the power transfer shaft; a non-rotating central housing configured to establish an outer pheriphery surrounding the power transfer shaft and blades, thereby defining a plenum; a plurality of airgates, the airgates being configured and attached to the central housing in a manner permitting pivoting action between a closed position whereby negligible airflow is admitted through the airgate to the central housing and an open position whereby non-negligible air flow is admitted to the central housing, the airgates further including an air dam portion configured to facilitate movement of the airgates from the closed to the open position under the impetus of a desired airflow; the blades each having an upper and a lower portion with respect to the Earth\s gravitation field, the upper blade portion being larger than the lower blade portion; the blades being of a configuration whereby while the blade is positioned in the power delivery position, the lower blade portion thereof is configured and positioned to collect air flow entering the central housing through the airgates and to channel the airflow towards the axis upon which the blade pivots, the upper blade portion thereof being configured and positioned to collect air flow both entering the central housing through the airgates and passing over the windmill outside the central housing, and to channel the air flow so collected generally parallel to the axis upon which the blade pivots, the blade while in the power delivery position thereby defining and presenting a generally concave surface to air flow passing through the airgates and over the central housing; the blades further being of a configuration whereby while the blade is positioned in the recovery position, the blade is configured to present a generally convex surface to air flow which may be present both within the central housing and flowing thereover, the upper and lower portions configured and positioned to conduct airflow generally away from the axis along which the blade pivots.