Patents Assigned to Central States Underwater Contracting, Inc.
  • Underwater trenching system
    Patent number: 4992000
    Abstract: An underwater trenching system comprises a closed trenching system that vacuums up sediment removed during the trenching operation and deposits that same sediment into the trench, thereby burying a pipeline that has settled into the trench. The invention provides a trenching sled having high pressure water jets for digging and a vacuum head and lines for sucking the resulting sediment into a surge tank on a barge, from which it is re-deposited by a bury sled.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: February 12, 1991
    Assignee: Central States Underwater Contracting, Inc.
    Inventor: Donald L. Doleshal