Folding mast ladder

Details Folding mast ladder Folding mast ladder

1979-08-22

1981-03-31

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Ladder

182100, 182156, B63B 2920

Patent

active

042588286

ABSTRACT:
A folding ladder entirely contained within a U-shaped channel is mounted in a sailboat mast and can be folded and stowed in a flush position, avoiding protruding surfaces on the circumference of the mast. A sliding bar is contained within the U-shaped channel containing a plurality of bracket protrusions which support a swivel pin which in turn support a brace bar connected to a foot bar. One end of the foot bar is fixed to the wall of the U-shaped channel. When the slide bar is moved downward the movement of the brace bar attached to the bracket protrusions extends each step bar forming a series of triangularly supported ladder steps.

REFERENCES:
patent: 646291 (1900-03-01), Krueger
patent: 928478 (1909-07-01), Smalley
patent: 1719997 (1929-07-01), Pirsch
patent: 1831332 (1931-11-01), Wagner
patent: 2148099 (1939-02-01), Bray
patent: 4132288 (1979-01-01), Bingham
patent: 4139079 (1979-02-01), Clark

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