Patents Assigned to Grafalloy Corporation
  • Fabrication of a hollow composite-material shaft having an integral collar
    Patent number: 5943758
    Abstract: A hollow golf club shaft is prepared by flag rolling a base layer of composite material pieces over a mandrel having a larger-diameter region and a reduced-diameter region. The base layer is optionally precompacted. A collar is slid along he length of the mandrel having the reduced-diameter region and base layer to lie adjacent to the larger-diameter region, and at least one overlayer composite material piece is flag rolled overlying the base-layer composite material pieces onto that portion of the mandrel having the reduced diameter.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: August 31, 1999
    Assignee: Grafalloy Corporation
    Inventor: Neal Haas
  • Construction for a fiber reinforced shaft
    Patent number: 4097626
    Abstract: A carbon graphite fiber reinforced shaft incorporating longitudinal plies and radial plies. In transverse aspect, the radial plies incorporate two interleaved helices with three turns around the shaft. The fibers in the two helices are oppositely oriented at an angle to the longitudinal axis of the shaft. The fibers in one radial ply have a modulus that is substantially 50% greater than the modulus of the opposed interleaved radial ply.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: June 27, 1978
    Assignee: Grafalloy Corporation
    Inventor: Richard Lee Tennent