{
  "patent_number": "US 7614852",
  "country": "US",
  "title": "Wind Turbine Blades with a Deeply Curved Front Surface",
  "original_title": "Wind turbine blade and assembly",
  "summary": "This patent describes a wind turbine blade designed with a deeply curved, concave front surface and a high camber ratio to potentially capture more wind energy.",
  "what_it_does": "This patent details a wind turbine blade with a specific aerodynamic shape. The blade's front surface, which faces the wind (the \"windward direction\"), is designed to be \"substantially concave in shape\" (Claim 1). This means it curves inwards, like the inside of a spoon. Additionally, the blade's \"camber ratio,\" a measure of its overall curvature, must be \"greater than or equal to approximately 4%\" (Claim 1), and can be as high as 50% (Claim 3). For example, a blade could have this concave front surface combined with a convex (outwardly curved) rear surface (Claim 2), creating a highly asymmetric profile (Claim 5) to optimize how the blade interacts with and captures energy from the wind.",
  "what_it_does_not_cover": [
    "Does not cover wind turbine blades where the front surface facing the wind is not substantially concave.",
    "Does not cover blades with a camber ratio less than 4%.",
    "Does not cover blades whose primary design features are symmetrical airfoils.",
    "Does not cover blades where the concavity of the front surface does not extend above the chord line within the specified range (Claim 27)."
  ],
  "filed": "2007-12-24",
  "granted": "2009-11-10",
  "expires": "2027-12-24",
  "status": "active",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Philip G. Clark",
      "url": "https://patentbrief.org/inventor/philip-g-clark"
    }
  ],
  "times_cited": 6,
  "tags": [
    "renewable_energy",
    "mechanical",
    "aerospace",
    "energy"
  ],
  "abstract": "A blade is disclosed for use in a wind turbine, with the blade having a longitudinal axis for extending radially outwardly from a center of rotation of the blade on the wind turbine. The blade has a front side with a front surface for orienting in a windward direction and a rear side with a rear surface for orienting in a leeward direction. The blade has a profile taken in a plane oriented substantially perpendicular to the longitudinal axis of the blade. The profile of the blade has a leading edge and a trailing edge. The profile is characterized by a camber ratio, and the camber ratio of the profile is greater than or equal to approximately 4%.",
  "url": "https://patentbrief.org/patent/us/7614852/wind-turbine-blade-and-assembly",
  "markdown_url": "https://patentbrief.org/patent/us/7614852/wind-turbine-blade-and-assembly/md",
  "google_patents_url": "https://patents.google.com/patent/US7614852",
  "relatedPatents": []
}