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:
Mar. 06, 1984
Filed:
Feb. 24, 1982
Applicant:
Inventors:
Clint Coleman, Warren, VT (US);
Hugh D Currin, Klamath Falls, OR (US);
Assignee:
North Wind Power Company, Inc., Waitsfield, VT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F03D / ;
U.S. Cl.
CPC ...
290 44 ; 290 55 ; 416135 ;
Abstract
In a pitch control system for a wind turbine, a mechanical control system changes pitch angle of the rotor blades collectively in response to blade pitch moment. The control system is designed to be used with a downwind constant speed two-bladed horizontal axis teetering hub wind turbine. Pitch placement controls torque for a synchronous alternator connected to the electrical power grid. The pitch control system is manually lockable from the ground in run or shutdown modes. An automatic shutdown mode provides fullfeathering for protection from large amplitude vibrations or loss of the electrical grid.