Ladder extension coupling

Details Ladder extension coupling Ladder extension coupling

1984-05-17

1985-05-28

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Stackable

Male and female connecting means

182207, 182 22, E06C 110, E06C 128

Patent

active

045194785

ABSTRACT:
A ladder extension is disclosed comprising two separable sections to be coupled together in longitudinally overlapping relation by first coupling means coupling a portion of a first ladder section proximate one end thereof to the second section so as to permit the first ladder section to be rotated with respect to the second ladder section to a position where second coupling means are aligned in position for engagement, preferably with stop means being provided to stop rotation of the first ladder section at a position where the second coupling means are aligned for engagement. The ladder comprises two separable sections which is easy to asemble by a single person even under adverse field conditions and which provides means to positively lock together the sections when assembled into an extension ladder.

REFERENCES:
patent: 66655 (1867-07-01), Turner
patent: 329922 (1885-11-01), Lyon
patent: 461521 (1891-10-01), Lovejoy
patent: 511849 (1894-01-01), Lang
patent: 700690 (1902-05-01), Hogan
patent: 1520414 (1924-12-01), Hamilton
patent: 1555344 (1925-09-01), Whitney
patent: 1935349 (1933-11-01), Breslow
patent: 2257863 (1941-10-01), Schwarz
patent: 2887260 (1959-05-01), McKinnie
patent: 3067836 (1962-12-01), Carnicelli
patent: 4226302 (1980-10-01), Roche

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