{
  "patent_number": "US 8932024",
  "country": "US",
  "title": "Wind Turbine Blades with Noise-Reducing Serrated Edges",
  "original_title": "Wind turbine blade and wind power generator using the same",
  "summary": "This patent describes a wind turbine blade design that reduces noise by attaching a special serrated plate to its trailing edge, integrated directly into one of the blade's outer surfaces.",
  "what_it_does": "The patent describes a wind turbine blade made from a \"back skin\" and a \"front skin\" bonded together. To reduce noise, a \"serrated plate\" is attached to the \"trailing edge\" (the back edge) of the blade. This plate has a wavy, saw-tooth-like \"serrated portion\" on its rear side. A key part of the design is how this plate is attached: it's formed as a single piece with either the back or front skin (Claim 1 specifies it's part of the back skin). The other skin then has a \"fitting portion\" (a semicircular bump) that locks into a \"fitting groove\" (a semicircular dip) on the serrated plate, securing the plate firmly. This specific attachment method ensures the serrated plate is precisely positioned to smooth airflow and suppress noise. For example, a wind turbine blade could have this serrated plate integrated directly into its back surface, with the front surface snapping into place to complete the blade and secure the noise-reducing feature.",
  "what_it_does_not_cover": [
    "Serrated plates that are simply glued or bolted onto the trailing edge without the specific \"fitting groove\" and \"fitting portion\" described in Claim 1.",
    "Serrated plates that are separate components and not formed integrally with one of the blade skins.",
    "Noise reduction methods for wind turbines that do not involve a serrated plate at the trailing edge.",
    "Serrated plates that do not have a serrated portion on their rear side.",
    "Blades where the serrated plate is not disposed along the wind flow at the trailing edge."
  ],
  "filed": "2008-08-06",
  "granted": "2015-01-13",
  "expires": "2028-08-06",
  "status": "active",
  "holder": "Mitsubishi Heavy Industries",
  "holder_url": "https://patentbrief.org/company/mitsubishi-heavy-industries",
  "inventors": [
    {
      "name": "Hiroshi Nishino",
      "url": "https://patentbrief.org/inventor/hiroshi-nishino"
    },
    {
      "name": "Kentaro Hayashi",
      "url": "https://patentbrief.org/inventor/kentaro-hayashi"
    }
  ],
  "times_cited": 20,
  "tags": [
    "energy",
    "mechanical",
    "aerospace",
    "materials"
  ],
  "abstract": "An object is to provide a wind turbine blade having a serrated plate that can be formed irrespective of the overall structure of the blade, that is attached in the optimum shape, and that can effectively suppress noise occurring at a trailing edge thereof, and also to provide a wind power generator using such a wind turbine blade. Provided is a wind turbine blade ( 9 ) formed by bonding a back skin ( 19 ) and a front skin ( 21 ) and having a serrated plate ( 35 ) attached to a trailing edge ( 33 ) thereof, and the serrated plate ( 35 ) is formed so as to be attached by bonding the back skin ( 19 ) and the front skin ( 21 ).",
  "url": "https://patentbrief.org/patent/us/8932024/wind-turbine-blade-and-wind-power-generator-using-the-same",
  "markdown_url": "https://patentbrief.org/patent/us/8932024/wind-turbine-blade-and-wind-power-generator-using-the-same/md",
  "google_patents_url": "https://patents.google.com/patent/US8932024",
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}