Ramp assembly for trailers and the like

Details Ramp assembly for trailers and the like Ramp assembly for trailers and the like

1987-07-13

1989-07-25

Spar, Robert J.

Material or article handling

Self-loading or unloading vehicles

Conveyor

14 711, B60P 100

Patent

active

048507881

ABSTRACT:
A ramp assembly for trailers which includes a pair of elongated, parallel ramp plates reciprocably supported in tracks under the bed of a trailer. An arresting cam assembly is mounted on the rear of the trailer, and includes a control handle which is connected to, and rotates, a cam rod which carries, and is keyed to, a plurality of spaced cam plates. These cam plates are rotated with the cam rod to bring the lobes of the cam plates against the ramp plates, forcing them into a locked status against the underside of the bed of the trailer. In another rotational position of the cam plates, the ramp plates can be pulled horizontally outwardly from the trailer bed to an inclined loading position, but a cusp on each of the cam plates functions to engage the ramp plates and prevent them from being pulled completely free of the trailer bed.

REFERENCES:
patent: 1699882 (1929-01-01), Ferguson
patent: 2370427 (1945-02-01), Sherry
patent: 3700124 (1972-10-01), Lawrence
patent: 3711882 (1973-01-01), Iller
patent: 3870170 (1975-03-01), Noble et al.
patent: 3977545 (1976-04-01), Lloyd
patent: 4078678 (1978-03-01), Tordella
patent: 4198187 (1980-04-01), Mountz

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