Patents Assigned to Concrete Pipe Consultants, Inc.
  • Patent number: 4035003
    Abstract: A pipe joint for large diameter steel pipe in the range of 54 to 140 inches or greater, reinforced plastic-mortor pipe larger than 42 inches, ductile-iron pipe larger than 30 inches, and glass reinforced plastic pipe larger than 20 inches which includes a spigot having an annular groove formed between two spaced ribs for receiving an annular gasket which extends outwardly beyond the ribs. Under usual circumstances, when the spigot is positioned within the bell of the adjacent pipe, the gasket engages the interior surface of the bell as well as the surfaces of the annular groove in the spigot. However, during assembly in those instances where the bell and/or the spigot are out of round, the spigot can be forced toward the bell so that the gasket engages the inner surface thereof around its entire periphery and can be held temporarily thereagainst by means of jacks and braces.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: July 12, 1977
    Assignee: Concrete Pipe Consultants, Inc.
    Inventor: Kenneth E. James