|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||415/072; 416/177; 416/223R|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 7 인용 특허 : 15|
The invention discloses at least one blade extending away from a beginning point and longitudinally along a central axis and approximating the shape of a spiral about said central axis. The blade comprises a beginning point disposed a first lateral distance away from the central axis and a terminating point disposed a second lateral distance away from the central axis, the second distance being greater than the first distance.
1. A propeller device for capturing wind energy, comprising: at least one blade extending away from a beginning point near a central axis and extending longitudinally along the central axis, said blade approximating the shape of a spiral about said central axis and forming an open center about the central axis, wherein the beginning point is located in the downwind direction of wind flow with respect to a terminating point;wherein said blade comprises a first radius near the beginning point and a second radius near a terminating point, the first radius b...