Filled composite structure
AssigneeLancaster Composite
InventorRobert H. Greene
Life of this patent
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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.
Claims12
A filled structure characterized by the combination of high compressive strength and tensile strength to allow a high bending load, the filled structure comprising:
- 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, and
- a hard core within said space, the hard core having a density of at least 35 pounds per cubic foot and a compressive strength of at least 1500 psi, the hard core being formed from a mixture of particulate cementitious material and liquid such that when said mixture hardens, said hard core is joined securely to said inside surface of said hollow structure.
A filled structure characterized by the combination of high compressive strength and tensile strength to allow a high bending load, the filled structure comprising:
- 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, and
- a hard core within said space and engaged with said inside surface, the hard core having a density of at least 35 pounds per cubic foot and a compressive strength of at least 1500 psi, the hard core being formed from a mixture of particulate cementitious material and liquid.
Dependencies are inferred from the claim text.