Step ladder

Details Step ladder Step ladder

1981-11-30

1984-03-20

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder with pivoted prop

Converging and contacting stiles or props

182200, E06C 744

Patent

active

044375450

ABSTRACT:
A step ladder for use on an uneven surface including an arcuate leveling member adapted to hold the step ladder straight on an uneven surface with means for securing the leveling member in any selected position.

REFERENCES:
patent: 203561 (1878-05-01), Sherwood
patent: 603579 (1898-05-01), Richardson
patent: 1258332 (1918-03-01), Hampton
patent: 1424934 (1922-08-01), Paterson
patent: 1442694 (1923-01-01), Martin
patent: 1511580 (1924-10-01), Prince
patent: 2639853 (1953-05-01), Pierce
patent: 2971602 (1961-02-01), West
patent: 3978944 (1976-09-01), Hickman

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