Self-erecting folding step stool

Details Self-erecting folding step stool Self-erecting folding step stool

1974-01-11

1977-03-08

Britts, Ramon S.

Horizontally supported planar surfaces

Folding

Legs fold axially parallel to surface edges

A47B 300

Patent

active

040106993

ABSTRACT:
A self-erecting step stool comprising a top, pivoted leg structures at the ends of the top, a pivoted leg holding strut between the legs and having positive engagement therewith when the legs are extended; a strengthening rib secured or integral to the top at the underside thereof, said pivoted strut being pivoted in journals which are secured to said strengthening rib whereby sidewise thrust on the leg structures at the ends of the step stool is transferred through the pivoted strut to the strengthening rib and thence to the top.

REFERENCES:
patent: 155999 (1874-10-01), Valley
patent: 290932 (1883-12-01), Richardson
patent: 320413 (1885-06-01), Thayer
patent: 1312137 (1919-08-01), Schloss
patent: 1519543 (1924-12-01), Kubinyi
patent: 2485178 (1949-10-01), Weinkauf
patent: 2784042 (1957-03-01), Clapper
patent: 3805711 (1974-04-01), Lakso

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