Twin vertical-axis wind turbine with automatic wind tracking

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Description

FIG. 1 is a perspective view of a twin vertical-axis wind turbine with automatic wind tracking according to the invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a sectional view thereof, taken along lines 6-6 as indicated in FIG. 5;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view of a second embodiment of a twin vertical-axis wind turbine with automatic wind tracking according to the invention;

FIG. 10 is a front elevational view thereof;

FIG. 11 is a back elevational view thereof;

FIG. 12 is a left-side elevational view thereof;

FIG. 13 is a right-side elevational view thereof;

FIG. 14 is a sectional view thereof, taken along lines 14-14 as indicated in FIG. 13;

FIG. 15 is a top view thereof; and,

FIG. 16 is a bottom view thereof.

Claims

The ornamental design for a twin vertical-axis wind turbine with automatic wind tracking, as shown and described.

Referenced Cited
U.S. Patent Documents
1441774 January 1923 Adams
1645855 October 1927 De Vore
4551631 November 5, 1985 Trigilio
6710469 March 23, 2004 McDavid, Jr.
D587196 February 24, 2009 Chong
D625261 October 12, 2010 Winkler et al.
20110089698 April 21, 2011 Ahmadi
Patent History
Patent number: D698727
Type: Grant
Filed: Dec 12, 2011
Date of Patent: Feb 4, 2014
Inventor: Dennis Patrick Steel (Moers)
Primary Examiner: Derrick Holland
Assistant Examiner: Lauren Calve
Application Number: 29/408,349
Classifications
Current U.S. Class: Wind Or Hand Powered (D13/115)