Patents Assigned to Perini Corporation
  • Patent number: 4616395
    Abstract: A method and apparatus for laying a railroad track includes laying, in tandem, a series of pre-cast concrete slabs on a prepared track bed, the slabs being isolated from the bed, and from each other, by rubber isolation pads, and the slabs having cavities formed on the top faces. The rails are held above the slabs, in their proper location, by removable gauge beams having adjustment means to exactly locate the rails. Before filling the cavities with concrete the shoulder-pins, used to secure the rails, are located with their pin portions in the cavities by being removably secured to templates. The templates are held suspended above the slabs by being removably attached to a rail. The rails are used as guides after setting their exact gauge (separation), elevation and cant (angle of inclination) on the gauge beams, to determine the positions of the templates and shoulder-pins.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: October 14, 1986
    Assignee: Perini Corporation
    Inventors: Virgil A. Farese, Fred C. Grover, Steve R. Moore, Robert W. Gilfillan
  • Patent number: 4363594
    Abstract: A pipe section positioning apparatus may be located partially below ground surface level, for example, in a trench to accurately lower and position heavy pipe sections, for example, concrete drain pipe sections, under control of a single operator who has an unobstructed view of the interior of the apparatus. The apparatus includes a body which may be positioned partially beneath ground level, an operator's platform attached to the body above ground level, an elevator within the body, a pipe cradle which is raised and lowered by the elevator and which temporarily holds a pipe section, a horizontally aligned track which is partially positioned beneath the pipe cradle to receive the pipe section and which is horizontally aligned, a ram which moves the pipe section horizontally on the track, and a pipe clamp assembly which clamps the pipe section and which then may be moved, under operator control, horizontally to accurately position and pipe section so that it may be joined with a previously laid pipe section.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: December 14, 1982
    Assignee: Perini Corporation
    Inventor: Andre Morin