Patents by Inventor James A. Boyd

James A. Boyd has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Trailing edge device for an airfoil
    Patent number: 4542868
    Abstract: The invention is a small wedge shaped flap (20) for attachment to or near the trailing edge (14) of a airfoil (10) which improves the coefficient of lift and reduces the coefficient of drag providing an overall increase in fuel ecomony at cruise conditions. In detail the wedge shaped flap (20) has a downward height (26) of between 0.5 percent to 1.5 percent of the chord (16) of the airfoil (10) and has an included angle (30) to the chord of between 15.degree. and 45.degree.. The wedge flap is preferably placed at distance (24) of between 0 to 1.0 percent of the chord (16) from the trailing edge (14).
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: September 24, 1985
    Assignee: Lockheed Corporation
    Inventor: James A. Boyd
  • Gutter cleaner
    Patent number: D247303
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: February 21, 1978
    Inventor: Desmond James Boyd