Patents Assigned to Nianbilla Company Limited
  • Vertical axis windmill
    Patent number: 4435124
    Abstract: A vertical axis windmill has a blade pivotally connected to a rotatable support structure on an axis passing through its center of gravity which is arranged to lie forward of its aerodynamic center whereby the blade automatically swings outwardly and inwardly when moving on the windward and leeward sides respectively of the axis of rotation of said support means.
    Type: Grant
    Filed: August 20, 1981
    Date of Patent: March 6, 1984
    Assignee: Nianbilla Company Limited
    Inventor: Yea K. Zheng