Patents by Inventor James P. Darling

James P. Darling 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).

  • Patent number: 5251895
    Abstract: An improved sports racquet has elements placed between the outer edge of the frame and the strings. The elements prevent the strings from touching the outer edge of the frame and move in response to a force applied in a direction generally perpendicular to the strings, thereby expanding the sweet spot, providing improved playability of the racquet, and significantly reducing the vibration that is transferred to the player's arm. Each element has two connected seating portions that seat in receptacles in the outer perimeter of the racquet. Thus, two seating portions move together when a ball strikes the playing surface.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: October 12, 1993
    Inventor: James P. Darling
  • Patent number: 4786055
    Abstract: An improved sports racquet is provided having elements placed between the outer edge of the frame and the strings. The elements prevent the strings from touching the outer edge of the frame and rotate in response to a force applied in a direction generally perpendicular to the strings, thereby expanding the sweet spot, providing improved playability of the racquet, and significantly reducing the fibration that is transferred to the player's arm. The elements are preferably spherical in shape and may be comprised of various materials, including acetal, plastic and metal. The elements preferably rest in receptacles in the racquet frame, which may be integral with the frame or separate pieces, such as sleeves or grommets, that are connected to the frame. The receptacles are preferably designed to have a surface with substantially the same curvature as the bottom surface of the elements.
    Type: Grant
    Filed: June 19, 1986
    Date of Patent: November 22, 1988
    Inventor: James P. Darling
  • Patent number: RE34420
    Abstract: An improved sports racquet is provided having elements placed between the outer edge of the frame and the strings. The elements prevent the strings from touching the outer edge of the frame and rotate in response to a force applied in a direction generally perpendicular to the strings, thereby expanding the sweet spot, providing improved playability of the racquet, and significantly reducing the .[.fibration.]. .Iadd.vibration .Iaddend.that is transferred to the player's arm. The elements are preferably spherical in shape and may be comprised of various materials, including acetal, plastic and metal. The elements preferably rest in receptacles in the racquet frame, which may be integral with the frame or separate pieces, such as sleeves or grommets, that are connected to the frame. The receptacles are preferably designed to have a surface with substantially the same curvature as the bottom surface of the elements.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: October 26, 1993
    Inventor: James P. Darling