Coupling for drop box system

Material or article handling – Self-loading or unloading vehicles – Separable load rack

Patent

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Details

B60P 178

Patent

active

047640804

ABSTRACT:
The coupling of the present invention is comprised of a carriage which moves along a track mounted in a support frame by means of a motor driven endless chain. The chain is connected to a pivot plate, which is rotatably attached to the carriage. The chain is connected to the side of the pivot plate facing the drop box, which is to be picked up by the device, at a location below the axis which the pivot plate rotates about, and to the other side of the pivot plate above this axis. Thus when the pivot plate strikes a stop, located near the bottom of the support frame, the pivot plate is rotated such that the tip of a U-shaped bail located on its top surface is raised. As a result the frame can then be moved toward the drop box until the bail is above a hook located on its front end. When the chain then is moved in the opposite direction and the carriage pulled free of the stop, the pivot plate rotates back to its original position and the tip of the bail drops over the hook and engages it.

REFERENCES:
patent: 1288462 (1918-12-01), Alborn
patent: 2591153 (1952-04-01), Hodges
patent: 2659504 (1953-11-01), Kranawetvogel et al.
patent: 3144149 (1964-08-01), Dempster et al.
patent: 3214046 (1965-10-01), Dempster et al.
patent: 3272546 (1966-09-01), Cooley
patent: 3894644 (1975-07-01), Alexander

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