Material or article handling – Self-loading or unloading vehicles – Conveyor
Patent
1996-02-20
1997-12-16
Werner, Frank E.
Material or article handling
Self-loading or unloading vehicles
Conveyor
414786, 414339, 14 24, 14 713, 901 25, B60P 143
Patent
active
056977549
ABSTRACT:
A deployable and retractable ramp assembly includes at least three Z-foldable ramp sections which are pivotally connected to each other and to a railroad car. A number of mechanical deployment and retraction facilitating elements--preferably gears--are mounted to the ramp sections and operatively connected to a plurality of actuators--preferably linear actuators such as hydraulic cylinders--mounted on and completely contained within ramp sections. Using a linear actuator on the railroad car the ramp sections, once folded, can be pivoted into a position substantially completely supported by the railroad car. The ramp sections (typically six in number and pivotally connected to a lever on the railroad car) may be automatically and positively deployed in less than twenty minutes, and once deployed allow railroad equipment to be moved to and from the railroad tracks.
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patent: 4068770 (1978-01-01), Boehringer
patent: 4510637 (1985-04-01), Zlotnicki
patent: 4911033 (1990-03-01), Rosheim et al.
patent: 4972539 (1990-11-01), Reiter
patent: 5312148 (1994-05-01), Morgan
patent: 5443353 (1995-08-01), Raymer
Lincoln Industries Corp
Werner Frank E.
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