Walking stepladder

Details Walking stepladder Walking stepladder

1979-10-15

1981-01-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Pivotally connected ladders, mutually sustaining

182116, 182165, E04G 118

Patent

active

042444446

ABSTRACT:
A walking stepladder has a pair of substantially identical ladder sides, relatively hinged at the top, each side having step rungs for ascent or descent of the ladder from either side. In walking the ladder, the user straddles the ladder top with his legs supported by opposed rungs at each side of the ladder, and shifts his body weight from side to side while concurrently retracting and extending the ladder sides to effect stepwise ladder movement to one side or the other. Releasable means is provided for limiting inward or retracting movement of the relatively hinged ladder sides to prevent ladder instability or collapsing while being walked.

REFERENCES:
patent: 300846 (1884-06-01), Chatfield
patent: 302040 (1884-07-01), Shumway
patent: 1467245 (1923-09-01), Anlauf
patent: 2317444 (1943-04-01), Dalton
patent: 3289789 (1966-12-01), Larson

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