Patents Assigned to Pearlson Engineering Company, Inc.
  • Drydock lifting platform
    Patent number: 4087979
    Abstract: A lifting platform of a drydock has plural sections along its length pivoted together at transverse support beams supported at each end by winch cables; flotation chambers in other embodiments contain air or foamed resin and are always below the lowest water level to offset 75% to 90% of the platform weight and reduce cable load.
    Type: Grant
    Filed: October 21, 1976
    Date of Patent: May 9, 1978
    Assignee: Pearlson Engineering Company, Inc.
    Inventor: Raymond Pearlson