Alexandria, Aug. 3 -- Siemens Gamesa Renewable Energy has been granted a patent for flexible balsa wood panel, a rotor blade, a wind turbine and a method. Stecher Harald and Wernlund Thomas Bro developed the invention. The patent application number is 16/249,106. The International Patent Classification codes are F03D 1/06 (20060101) and B32B 3/16 (20060101). Cooperative Patent Classification codes are F03D 1/0675 (20130101), B32B 3/16 (20130101), F05B 2230/31 (20130101) and F05B 2280/4002 (20130101).
The abstract released by U.S. Patent and Trademark Office states, "A flexible balsa wood panel for a rotor blade of a wind turbine, including a plurality of balsa wood modules and a polymer film which is attached to a surface of each balsa wood module to connect the balsa wood modules together is provided. The flexible balsa wood panel has the following advantages. An adhesion area of the polymer film is significantly larger than that of a glass fiber mesh. This in turn reduces the risk of balsa wood modules falling off during handling the flexible balsa wood panel. A polymer film with a high melting temperature relative to a maximum blade curing temperature can be selected in order to avoid curing process induced delaminations. Furthermore, due to the polymer film attached to the first surface, a more uniform adhesion may be achieved compared to a currently used glass fiber mesh."