Multipurpose ladder

Details Multipurpose ladder Multipurpose ladder

1986-10-02

1987-10-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Convertible

Ladder

182 27, E06C 108, E06C 1383

Patent

active

046992464

ABSTRACT:
The present invention discloses a multipurpose ladder, and comprises four section-ladders; four pivot joint device provided between section-ladders, respectively, for connection but at least one pivot joint device being separable. Said pivot joint devices are available for bending or folding. So that, the multipurpose ladder can be change into a climbing ladder, horse ladder, frame ladder and right-angled ladder.

REFERENCES:
patent: 316643 (1885-03-01), Niehaus
patent: 781898 (1905-02-01), McNaughton
patent: 1722844 (1929-07-01), Faulkenberry
patent: 2012592 (1935-08-01), Skiba
patent: 3143185 (1964-08-01), Wenger
patent: 3208553 (1965-09-01), Gray
patent: 3474881 (1969-10-01), Green
patent: 3554318 (1971-01-01), Knight

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