Self folding platform

Details Self folding platform Self folding platform

1976-02-02

1977-02-15

Johnson, Richard J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 9R, B60P 144

Patent

active

040078442

ABSTRACT:
A load lifting and lowering platform comprises a pair of hingedly interconnected platform sections that are foldable between a horizontally extending, load bearing position and a vertically extending collapsed position. A forward one of the platform sections is hingedly connected at its forward edge to lower ends of a pair of runner assemblies that are vertically movably mounted in a supporting framework. A pair of chains are interconnected between upper ends of the pair of runner assemblies and outer ends of the outer one of the platform sections. Cooperating cam elements, interposed between the forward edge of the forward platform section and the supporting framework, translate vertical movement of the runner assemblies into angular movement of the platform sections, in cooperation with the chains, for folding and unfolding of the platform sections.

REFERENCES:
patent: 3275170 (1966-09-01), MacRae
patent: 3791541 (1974-02-01), Himes
patent: 3795329 (1974-03-01), Martin
patent: 3800915 (1974-04-01), Himes
patent: 3831788 (1974-08-01), Erlinder
patent: 3968890 (1976-07-01), Robson

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