Patents Assigned to Lancaster Composite
  • Patent number: 6284336
    Abstract: A filled structure includes a fiber reinforced resinous hollow structure having a tensile strength of at least 30,000 psi, and an inside surface forming a boundary which defines a space. A hard core is provided within the space. The hard core has a density of at least 35 pounds per cubic foot and a compressive strength of at least 1500 psi. The hard core is formed from a mixture of particulate cementitious material and liquid. At least one tendon under stress is provided in the hard core. The tendon is constructed and arranged to exert permanent stress on the hard core.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: September 4, 2001
    Assignee: Lancaster Composite
    Inventor: Robert H. Greene
  • Patent number: 6083589
    Abstract: A filled structure characterized by the combination of high compressive and tensile strength to allow a high bending load includes a fiber reinforced resinous hollow structure having a tensile strength of at least 30,000 psi. The hollow structure has first and second ends, an inside surface forming a boundary which encloses a space, and an outside surface. At least a portion of the outside surface of one of the ends has a roughened portion sufficient to provide frictional resistance with the ground when the one end is driven into the ground. A hard core is disposed within the space enclosed by the hollow structure. The hard core has a density of at least 35 pounds per cubic foot and a compressive strength of at least 1500 psi. The hard core is formed from a mixture of particulate cementitious material and liquid.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: July 4, 2000
    Assignee: Lancaster Composite
    Inventor: Robert H. Greene
  • Patent number: 6048594
    Abstract: A filled structure includes a fiber reinforced resinous hollow structure having a tensile strength of at least 30,000 psi, an inside surface forming a boundary which encloses a space, and a hard core within the space. The hard core has a density of at least 35 pounds per cubic foot and a compressive strength of at least 1500 psi. The hard core is formed from a mixture of particulate cementitious material and liquid such that when the mixture hardens, the hard core is mechanically locked to the inside surface of the hollow structure.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: April 11, 2000
    Assignee: Lancaster Composite
    Inventor: Robert H. Greene