Material or article handling – Self-loading or unloading vehicles – Conveyor
Patent
1992-11-10
1994-04-26
Huppert, Michael S.
Material or article handling
Self-loading or unloading vehicles
Conveyor
414480, B65G 6928
Patent
active
053061136
ABSTRACT:
An improved fold out ramp system apparatus for a flat bed trailer includes a tapered tail end extending rearwardly from the trailer; at least one transition ramp having a front end pivotally secured to the trailer in close proximity to the juncture between the tapered tail end and the trailer; a clamping mechanism for selectively clamping the transition ramp in either an elevated configuration or a sloping configuration; and a tail ramp pivotally secured to a rear end of each of the transition ramps in end-to-end relationship. A brace pivotally connected to the tapered tail end is releasably connectable to the tail ramp to form a blocking configuration. A leaf spring having one end fixedly secured to the trailer is adapted to urge the transition ramp rear end upwardly to counter the weight thereof. Similarly, a torsional spring is adapted to urge the tail ramp free end upwardly relative to the transition ramp in order to counter the weight of the tail ramp. In a second embodiment of the invention, a coil spring replaces the leaf spring to urge the transition ramp upwardly to counter the weight thereof, and a pair of rotatable rods with handles are provided to lock the transition ramp in the elevated position and to lock the tail ramp in a travel position.
REFERENCES:
patent: 2756882 (1954-10-01), Albertson
patent: 2900094 (1959-08-01), Ferguson
patent: 3795333 (1974-03-01), Tebben
patent: 3834565 (1974-09-01), Goodman et al.
patent: 4088235 (1978-05-01), Thacker
patent: 4144979 (1979-03-01), Leach et al.
patent: 4305694 (1981-12-01), Chan
patent: 4380415 (1983-04-01), Higginson et al.
patent: 4475761 (1984-10-01), Milroy et al.
patent: 4647270 (1987-03-01), Maloney
patent: 4657233 (1987-04-01), Vroom
patent: 4729712 (1988-03-01), Corley, Jr.
patent: 4792274 (1988-12-01), Cockram
patent: 4850788 (1989-07-01), Dickson
patent: 4979867 (1990-12-01), Best
patent: 5145310 (1992-09-01), Calzone
Huppert Michael S.
Keenan James
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