The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 1979
Filed:
Feb. 10, 1975
Herman M Drees, Marstons Mills, MA (US);
Other;
Abstract
A wind turbine apparatus in which a plurality of wind responsive elements are movably mounted, such as by being pivotally mounted, on a movable means which produces rotary motion. The positions of the wind responsive elements are arranged to provide a drag force on at least one of the elements in response to the wind when the speed of rotary motion is below a predetermined level so as to produce a starting force to initiate and maintain the rotary motion. When the speed of the rotary motion exceeds such predetermined level the positions of such wind responsive elements are such that a lift force is provided thereon in response to the wind so that the rotary motion can achieve speeds which are considerably higher than those achieved by the starting force.