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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.:

US 11629689 B1

PDFFull Text
Date of Patent:
Apr. 18, 2023

Filed:

Nov. 10, 2015

Polyurethane material, process for preparing such material and protective cover for wind turbine blade

Applicant:

Polytech A/s, Bramming, DK;

Inventors:

Mads Kirkegaard, Bramming, DK;

Richard Baker, Bramming, DK;

Assignee:

POLYTECH A/S, Bramming, DK;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Kevin A Lathers

Int. Cl.
CPC ...
F03D 1/06 (2006.01); C08G 18/65 (2006.01); C08L 75/04 (2006.01); C08G 18/32 (2006.01); C08G 18/76 (2006.01); C08J 5/12 (2006.01); F03D 80/30 (2016.01); F03D 80/40 (2016.01); B29D 99/00 (2010.01); B29K 75/00 (2006.01);
U.S. Cl.
CPC ...
F03D 1/0675 (2013.01); C08G 18/3206 (2013.01); C08G 18/6511 (2013.01); C08G 18/7671 (2013.01); C08J 5/124 (2013.01); C08L 75/04 (2013.01); B29D 99/0025 (2013.01); B29K 2075/00 (2013.01); C08J 2375/04 (2013.01); C08J 2475/04 (2013.01); F03D 80/30 (2016.05); F03D 80/40 (2016.05); F05B 2230/20 (2013.01); F05B 2230/23 (2013.01); F05B 2230/40 (2013.01); F05B 2280/4003 (2013.01); F05B 2280/4011 (2013.01); Y02E 10/72 (2013.01); Y02P 70/50 (2015.11);
Abstract

The polyurethane material is prepared from a polyol, butanediol, and an isocyanate. The protective cover is adapted to be attached along at least a part of a longitudinal edge of the wind turbine blade by adhesion of an inside of the protective cover to a surface of the longitudinal edge of the wind turbine blade. The protective cover is elongated in a longitudinal direction and has an at least substantially U-formed cross-section. The protective cover includes a central cover section extending in the longitudinal direction and two peripheral cover sections extending in the longitudinal direction at either side of the central cover section, respectively. The central cover section has a minimum thickness of at least 1 millimetre, and each peripheral cover section has a thickness decreasing from a maximum thickness of at least 1 millimetre to a minimum thickness of less than ½ millimetre.

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