Mobile and steerable lifting and setting-down apparatus for larg

Details Mobile and steerable lifting and setting-down apparatus for larg Mobile and steerable lifting and setting-down apparatus for larg

1989-09-08

1991-04-09

Spar, Robert J.

Material or article handling

Opposed shelf-type elevator and transporter

2804181, 280442, B60P 340

Patent

active

050060325

ABSTRACT:
In mobile and steerable lifting and setting-down apparatus for large transportable receptacles, in order to ensure steerability of the apparatus not only in pulling operation, but also in backward pushing operation, steering arms are attached to be movable up and down to the wheel cradles carrying the running wheels, the steering arms being articulated by their free ends to a steering rod which is mounted to be movable rotationally about its axis. A central shaft is coupled to the steering rod to be relatively movable in the direction of the axis of the shaft. The central shaft is pivoted by its inner end by means of a pintle to a connecting piece which in turn is mounted on the large receptacle to be swingable about an axis parallel to the base of the receptacle. The articulation point for the central shaft on the connecting piece which is formed by the pintle is located laterally in alignment with the pivots of the two adjacent wheel cradles. The steering of the running wheels takes place through the central shaft by way of the steering rod and steering arms while in pulling or backward pushing operation the corresponding forces act on the large receptacle by way of the central shaft, the connecting piece and the connecting posts.

REFERENCES:
patent: 2785814 (1957-03-01), Corley
patent: 3193301 (1965-07-01), Talbert et al.
patent: 3631999 (1972-01-01), Walerowski
patent: 4134601 (1979-01-01), Propst
patent: 4452555 (1984-06-01), Calabro

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