Patents Examined by Bay Ann Spahn
  • Patent number: 4850739
    Abstract: A method and apparatus for constructing an articulating pavement comprising the placement in a first layer of a multiplicity of identically shaped foundation units on a subsurface. Each of the foundation units in the first layer is interlocked with adjacent foundation units in the first layer. Overlaid upon the first layer is a second layer of identical foundation units each of the foundation units in the second layer interlocked with adjacent units in the second layer. The units are shaped to create cavities between the first layer and second layer and between adjacent units in the first and second layers. Sufficient cement is then injected through orifices in the units to substantially fill the cavities. The cement is allowed to harden sufficiently to form latch pins which secure the units in an interlocked arrangement and articulatable in both the horizontal and vertical directions.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: July 25, 1989
    Inventor: Roberto L. Gargollo