Vertical-axle wind turbine
Patent 4818180 Issued on April 4, 1989. Estimated Expiration Date: 
February 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 465681 584986 631982 802791 1198410 1352952 1364681 1581537 1707507 Wind-driven prime mover InventorApplicationNo. 07/167477 filed on 02/29/1988US Classes:416/117, Responsive to gravity or working fluid force416/139Including weight bias meansExaminersPrimary: Powell, Everette A. Jr.International ClassesF03D 7/06 (20060101)F03D 7/00 (20060101) AbstractAn apparatus relating to a vertical-axle wind turbine comprises fore eccentric compressible and tensible slide-cantilevers, rear eccentric tensible ropes, dual-rocker trapezoid linkages, slightly inclined flap-blades, and counter-lever with equipoises. Accordingly, all blades on the wind turbine can catch favorable wind force at optimum leeway about 260 degrees each rotation; can absorb centrifugal, centripetal and circumferential shocks from gusts and variable wind force and convert the same to the same direction of torque; can adjust their radius against variable wind speed to stabalize the rotary speed; and can release resistance from relative wind sensitively and streamlined within the remaining 100 degrees of the rotation under the control of respective dual-rocker trapezoid linkages and equipoises to drive the apparatus for converting wind force to mechanical power most efficiently for commitment. | |
