Self loading and unloading pre-cast concrete hauling unit

Details Self loading and unloading pre-cast concrete hauling unit Self loading and unloading pre-cast concrete hauling unit

1989-11-16

1991-02-26

Olszewski, Robert P.

Material or article handling

Opposed shelf-type elevator and transporter

414495, 280790, B60P 300

Patent

active

049957724

ABSTRACT:
A computer automated hydraulic hauling unit for transporting precast concrete bridge segments from a casting site to an erection site. The apparatus includes a transportable chassis having computer controlled hydraulic members with means to elevate precast bridge segments from casting forms. The operator sets the lifting and transport parameters in the computer controller from the control panel for elevation and lift control. Each segment is rolled into place on a trailer bed and through automated electronic circuits the hydraulic cylinders apply force to raise the segments onto a movable and uniform beam structure. After elevation to a preselected height each segment is anchored by means of pinning vertical interlocking beams made of high strength structural steel. This computerized hydraulic beam trailer can accommodate one or two segments per load. This apparatus provides construction companies with a safe, automated method to transport precast segments by a self-loading and unloading mechanism that eliminates expensive extra hauling operations.

REFERENCES:
patent: 3786951 (1974-01-01), Ruff
patent: 3967743 (1976-07-01), Yoder
patent: 4061353 (1977-12-01), Kingman
patent: 4221530 (1980-09-01), Williams
patent: 4455115 (1984-06-01), Alger
patent: 4491449 (1985-01-01), Hawkins
patent: 4511303 (1985-04-01), O'Neill
patent: 4792272 (1988-12-01), Oswald

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