IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0137567
(2005-05-26)
|
등록번호 |
US-7381030
(2008-06-03)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
8 |
초록
▼
A vertical axis wind turbine assembly, such as a Savonius, typically mounted on a watercraft, utilizes a number of different shroud configurations to substantially preclude rotation when docked. Collapsible "curtains" mounted above the wind engaging elements, pre-defined shape or inflatable bladder
A vertical axis wind turbine assembly, such as a Savonius, typically mounted on a watercraft, utilizes a number of different shroud configurations to substantially preclude rotation when docked. Collapsible "curtains" mounted above the wind engaging elements, pre-defined shape or inflatable bladder inserts for convex volumes of the turbine rotor, pull over sheet material covers for the convex volumes, and a wrap-around flexible sheet, each may be utilized as shrouds. A human or wind powered boat is provided with an adjustable pitch propeller which includes cams mounted on propeller blades and movable by an operator-controlled sleeve to the desired position for a positive or negative pitch. The wind turbine may comprise rotor stages of different hand, rotating in opposite directions, and having substantially concentric shafts operatively connected to oppositely rotating propellers, for driving the boat forward.
대표청구항
▼
The invention claimed is: 1. A vertical axis wind turbine assembly comprising: a shaft; a structure which mounts said shaft for rotation about a substantially vertical axis; a plurality of wind engaging elements operatively mounted to the shaft which operatively engage wind and rotate said shaft in
The invention claimed is: 1. A vertical axis wind turbine assembly comprising: a shaft; a structure which mounts said shaft for rotation about a substantially vertical axis; a plurality of wind engaging elements operatively mounted to the shaft which operatively engage wind and rotate said shaft in response thereto; and a shroud which collapses over the wind engaging elements, is inserted among the wind engaging elements, or flexibly wraps around the wind engaging elements, so that when utilized substantially retards or prevents rotation of said shaft about its axis. 2. A vertical axis wind turbine assembly as recited in claim 1 wherein said shroud comprises a collapsible shroud operatively mounted above at least some of said wind engaging elements and positioned so that, when in a collapsed position, substantially does not interfere with wind acting upon said wind engaging elements, or rotation of said shaft, but when moved from the collapsed position to a deployed position substantially blocks wind access to at least some of said wind engaging elements so as to substantially retard or prevent rotation of said shaft. 3. An assembly as recited in claim 2 wherein said structure which mounts said shaft includes a stationary, with respect to said shaft, component mounted adjacent a top portion of said shaft, and wherein said collapsible shroud is operatively connected to said stationary top structure and said shroud does not rotate with said shaft. 4. An assembly as recited in claim 2 wherein said collapsible shroud is operatively connected to, and rotates with, said shaft. 5. An assembly as recited in claim 2 wherein said shroud when in a deployed position substantially blocks wind access to all of said wind engaging elements. 6. An assembly as recited in claim 1 wherein said wind engaging elements comprise a plurality of substantially convex volumes; and wherein said shroud comprises at least one insert which substantially blocks wind access to at least one substantially convex portion of a wind engaging element so as to substantially retard or prevent rotation of said shaft. 7. An assembly as recited in claim 6 wherein said insert has a substantially pre-defined shape and is held in place in a convex volume of a wind, engaging element. 8. An assembly as recited in claim 6 wherein said insert comprises at least one collapsible or deployable bladder operatively mounted adjacent at least some of the wind engaging elements and positioned so that, when in a collapsed position, substantially does not interfere with wind acting upon the wind engaging elements, or rotation of the shall, but when moved from the collapsed position to a deployed position substantially blacks wind access to at least one substantially convex volume of a wind engaging element so as to substantially retard or prevent rotation of said shaft. 9. An assembly as recited in claim 8 wherein said bladder is connected to a source of compressed gas which can inflate the bladder to deploy it. 10. An assembly as recited in claim 9 wherein said source of compressed gas is manually activated. 11. An assembly as recited in claim 9 wherein said source of compressed gas is automatically activated in response to a pre-determined wind speed. 12. An assembly as recited in claim 1 wherein said shroud comprises a flexible sheet of material which is operatively connected to one peripheral portion of said wind turbine, and wraps around said wind turbine and is held in place in said wrapped position. 13. An assembly as recited in claim 12 wherein said flexible sheet of material is held in place in said wrapped position by cooperating hook and loop fasteners. 14. An assembly as recited in claim 1 wherein said shaft, shaft mounting structure, and wind engaging elements are mounted on a watercraft, and wherein the watercraft includes a variable pitch propeller assembly, operable by an operator positioned in or on the watercraft. 15. An assembly as recited in claim 14 wherein the propeller variable pitch is controlled by one or more cams operatively connected to propeller blades, and a reciprocal sleeve operatively engaging the cams. 16. An assembly as recited in claim 14 wherein the variable pitch propeller assembly comprises: a central drive shaft surrounded by a hub; a sleeve reciprocal on the hub; a plurality of blades each rotatably connected to the hub and having a cam; and a device which operatively biases the cams into contact with the sleeve so that reciprocation of the sleeve effects rotation of the blades with respect to the hub to change the pitch thereof. 17. An assembly as recited in claim 1 having at least first and second rotor stages of spokes and vanes having different hands, and constructed and positioned to rotate in different directions; and wherein said shaft comprises a first shaft, substantially concentric with a second shaft, said shafts operatively connected to said rotor stages and rotatable therewith in response to wind; and first and second driven devices operatively connected to said shafts and driven separately by said shafts. 18. An assembly as recited in claim 17 wherein the driven devices are first and second propellers operatively mounted for rotation in opposite directions, and wherein said wind turbine is mounted on a watercraft so that rotation of said first and second propellers powers said watercraft forward. 19. A vertical axis wind turbine assembly comprising: a shaft; a structure which mounts said shaft for rotation about a substantially vertical axis; a plurality of wind engaging elements operatively mounted to the shaft which operatively engage wind and rotate said shaft in response thereto, wherein said wind engaging elements comprise a plurality of substantially convex volumes; and a shroud which pulls over at least one of the wind engaging elements, so that when utilized substantially retards or prevents rotation of said shaft about its axis, wherein said shroud comprises at least one rolled sheet positioned to be pulled over at least one convex volume and held in place covering the volume. 20. An assembly as recited in claim 19 wherein said shroud comprises a rolled sheet positioned to be pulled over each convex volume and held in place covering a respective volume.
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