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:
Jan. 01, 2008
Filed:
Nov. 03, 2005
Robert A. Vanderhye, McLean, VA (US);
Michael H. Dexter, Fairfax Station, VA (US);
Aaron L. Aldrich, Little Falls, NY (US);
Brad A. Rotsky, Somerset, MA (US);
Justin R. Hascup, Boston, MA (US);
Robert A. Vanderhye, McLean, VA (US);
Michael H. Dexter, Fairfax Station, VA (US);
Aaron L. Aldrich, Little Falls, NY (US);
Brad A. Rotsky, Somerset, MA (US);
Justin R. Hascup, Boston, MA (US);
Other;
Abstract
A Savonius three bladed vertical axis wind turbine rotor has operational characteristics superior to those of conventional three bladed rotors. The blades have high curvature and a high skew factor, for example a curvature of greater than 7:1 (e.g. 2:1-5:1), and a skew factor of greater than 0.6 (e.g. 0.78-0.9). The rotor also includes at least one vertical shaft, the blades operatively connected to the shaft. The rotor typically has an aspect ratio of at least 2:1. The rotor typically has a maximum power coefficient (Cp) of at least twice that of an otherwise identical rotor with a skew factor of 0.5 or less. The rotor can drive a generator with a drive which automatically increases the effective gear ratio as the rotational speed of the rotor increases; or the rotor can be connected to a propeller of a multihull wind powered boat.