Ladder apparatus and hinge system therefor

Details Ladder apparatus and hinge system therefor Ladder apparatus and hinge system therefor

1991-09-16

1992-06-30

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Ladder

182100, 182106, 182189, E06C 912

Patent

active

051254760

ABSTRACT:
A ladder apparatus comprising a longitudinally elongated step support for mounting between an upper level and a lower level at a forward angle of inclination. The elongated support has an upper end and a lower end. A series of steps are mounted relative to the elongated support. A hinge assembly is mounted relative to the elongated support adjacent its upper end. The hinge assembly includes a pivot positioned adjacent one of the outer longitudinal edges enabling the ladder apparatus to be swung at least about 90.degree. between an operable position and a stowed position. The hinge assembly preferably comprises retaining means for inhibiting the ladder apparatus from swinging away from the operable position.

REFERENCES:
patent: 907401 (1908-12-01), Prouty
patent: 1116829 (1914-11-01), McCoy
patent: 1141716 (1915-06-01), Kjellstrom
patent: 3019851 (1962-02-01), Doss
patent: 3313374 (1967-04-01), Teach
patent: 4037686 (1977-07-01), Shull
patent: 4106591 (1978-08-01), Cohen et al.
patent: 4807719 (1989-02-01), Burkstrand
patent: 4981195 (1991-01-01), Merrick

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