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:
Jun. 09, 2015
Filed:
Jun. 15, 2012
Applicant:
Peter Grabau, Kolding, DK;
Inventor:
Peter Grabau, Kolding, DK;
Assignee:
Envision Energy (Denmark) ApS, Silkeborg, DK;
Primary Examiner:
Int. Cl.
CPC ...
F03D 11/00 (2006.01); F03D 7/02 (2006.01); F03D 1/00 (2006.01); F03D 1/06 (2006.01);
U.S. Cl.
CPC ...
F03D 7/0228 (2013.01); F03D 1/001 (2013.01); F03D 1/0675 (2013.01); F05B 2230/60 (2013.01); F05B 2240/302 (2013.01); F05B 2260/301 (2013.01); F05B 2260/79 (2013.01); Y02E 10/721 (2013.01); Y02E 10/723 (2013.01); Y02E 10/728 (2013.01);
Abstract
A wind turbine blade is described having a pitch system coupling which is adapted to allow fasteners, such as bolts, of such a coupling to be tightened from the inside of the blade. This removes the need for relatively difficult and expensive external maintenance operations to tighten pitch coupling bolts. The coupling is arranged to present first and second internal bearing surfaces, against which the bolts of the pitch coupling can be tightened. The coupling may comprise a shaped end portion of an inner blade section, and/or the pitch system may comprise an additional bolting collar to facilitate this arrangement.