Walk-through ladder

Details Walk-through ladder Walk-through ladder

1999-02-26

2000-08-01

Stodola, Daniel P.

Fire escape, ladder, or scaffold

Wall- or floor-attached

182106, E04B 300, E06C 900, E06C 718

Patent

active

060952830

ABSTRACT:
A fixed ladder has a first plurality of parallel rungs arranged along a lower section thereof and also has a walk-through section with vertical side rails arranged at the top thereof. A second plurality of parallel rungs is arranged along the walk-through section. This second plurality of rungs is attached at one end to the vertical side rails of the walk-through section and is easier to hold then the vertical side rails if a foot or a climber slips near the top of the ladder while mounting or dismounting at the walk-through section.

REFERENCES:
patent: 2432189 (1947-12-01), Bucher et al.
patent: 2597902 (1952-05-01), Roketa
patent: 2634989 (1953-04-01), Skreberg
patent: 2641785 (1953-06-01), Pitts et al.
patent: 4130177 (1978-12-01), Pandolph
patent: 4265333 (1981-05-01), Rowell et al.
patent: 4921069 (1990-05-01), Boyles
patent: 5033582 (1991-07-01), Hoben
patent: 5282339 (1994-02-01), Devlin et al.
patent: 5692582 (1997-12-01), Lindemood
Cotterman Co., Advertisement, (Publication Date Unknown).

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