Patents by Inventor Michael T. Spellman

Michael T. Spellman 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).

  • Fan spider with rake angle
    Patent number: 4242046
    Abstract: A sheet metal construction for a fan spider. The spider arms each carry an integral rib running centrally along the arm and each rib is flat on its upper surface to mount a fan blade. The novelty of the invention resides in canting forwardly the spider arms. Such canting reduces certain stresses in the fan, thereby reducing cost of manufacture.
    Type: Grant
    Filed: June 15, 1978
    Date of Patent: December 30, 1980
    Assignee: Wallace Murray Corporation
    Inventors: Joseph V. Matucheski, Clifford S. L. Yee, Michael T. Spellman, Donald J. Hartley, William D. Barton
  • Flexible bladed fan construction
    Patent number: 4172693
    Abstract: A flexible fan blade construction of the type wherein a decamber limiter is carried by each spider arm and bears against one side of its associated fan blade to thereby limit flexing (decamber) thereof. According to this invention, the decamber limiter terminates short of the heel of each fan blade. High stress concentrations due to contact between the heel edge of each fan blade and its associated decamber limiter are avoided by this novel construction.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: October 30, 1979
    Assignee: Wallace Murray Corporation
    Inventors: William D. Barton, Donald J. Hartley, Joseph V. Matucheski, Michael T. Spellman, Clifford S. L. Yee
  • Twisted flex fan
    Patent number: 4105366
    Abstract: A fan blade construction for an automobile cooling system. The twist angle of the blade, as measured by the rotation of an imaginary line joining the leading and trailing edges, varies linearly or non-linearly along the length of the blade, the leading edge of the blade is rigid and the trailing edge of the blade is flexible. In another embodiment, the fan blade is resiliently biased against a portion of its mounting arm to inhibit flutter.
    Type: Grant
    Filed: September 14, 1976
    Date of Patent: August 8, 1978
    Assignee: Wallace Murray Corporation
    Inventor: Michael T. Spellman