Patents by Inventor James L. Pack

James L. Pack 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).

  • Portable overhead crane and method of installing it
    Patent number: 4053059
    Abstract: This disclosure relates to a method of and apparatus for lifting a load utilizing an existing bridge or gantry-type overhead crane in combination with a portable lifting beam or Strongback adapted to be lifted into position and partially supported by the existing bridge crane. The portable lifting beam includes a horizontally extending main beam having a telescoping section to reduce the longitudinal extent of the main beam to a dimension less than the distance between the parallel rails upon which the bridge crane is supported, whereby the lifting beam may be raised and lowered by the bridge crane between the parallel rails while being disposed perpendicular thereto. Once the lifting beam is lifted above the parallel rails, the hydraulic means are actuated to extend the telescoping section from its retracted position to increase the longitudinal extent of the main beam to a dimension equivalent to the distance between the parallel rails whereby the portable lifting beam or Strongback may be disposed thereon.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: October 11, 1977
    Assignees: Southwire Company, National Steel Corporation
    Inventors: Winfield M. Hass, Howard E. Niehaus, James L. Pack
  • Bridge crane with load cells for correlating the lift operation
    Patent number: 3973679
    Abstract: This disclosure relates to a method of and apparatus for lifting a load utilizing an existing bridge or gantry-type overhead crane in combination with a portable lifting beam or Strongback adapted to be lifted into position and partially supported by the existing bridge crane. The portable lifting beam includes a horizontally extending main beam having a telescoping section to reduce the longitudinal extent of the main beam to a dimension less than the distance between the parallel rails upon which the bridge crane is supported, whereby the lifting beam may be raised and lowered by the bridge crane between the parallel rails while being disposed perpendicular thereto. Once the lifting beam is lifted above the parallel rails, the hydraulic means are actuated to extend the telescoping section from its retracted position to increase the longitudinal extent of the main beam to a dimension equivalent to the distance between the parallel rails whereby the portable lifting beam or Strongback may be disposed thereon.
    Type: Grant
    Filed: March 18, 1975
    Date of Patent: August 10, 1976
    Assignees: Southwire Company, National Steel Corporation
    Inventors: Winfield M. Hass, Howard E. Niehaus, James L. Pack