Fold-up ladder

Details Fold-up ladder Fold-up ladder

1982-01-21

1984-07-03

Machado, R. P.

Fire escape, ladder, or scaffold

Unitary foldable, rigid scaffold or ladder

Collapsible ladder

182211, 182196, E06C 1383

Patent

active

044573910

ABSTRACT:
A portable folding ladder comprising a plurality of U-shaped modules having a rung and two vertical portions, the modules movable connected to each other, and when opened becoming progressible narrower as they approach the top of the ladder, when folded the narrower modules fitting inside of the next wider modules and locking means to lock the modules in a rigid manner when the ladder is extended and open.

REFERENCES:
patent: 303884 (1884-08-01), Reisener
patent: 308179 (1884-11-01), Linnenbrink
patent: 311661 (1885-02-01), Joyut
patent: 1228248 (1917-05-01), Rudd
patent: 1644739 (1927-10-01), McCracken
patent: 1722844 (1929-07-01), Faulkenberry
patent: 2529112 (1950-11-01), Steele
patent: 3216526 (1965-11-01), Cole
patent: 3554318 (1971-01-01), Knight
patent: 3655012 (1972-04-01), Hoffmann
patent: 3730295 (1973-05-01), Deese
patent: 3811151 (1974-05-01), Kuemmerlin

Affiliated with

Also associated with

Rating

Fold-up ladder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fold-up ladder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fold-up ladder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1626375