Metal ladder construction with reinforced side rails

Details Metal ladder construction with reinforced side rails Metal ladder construction with reinforced side rails

1988-12-16

1991-03-12

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Unitary foldable, rigid scaffold or ladder

Collapsible ladder

182107, 182214, 182219, E06C 1383, E06C 708

Patent

active

049989820

ABSTRACT:
A metal construction for a ladder includes two spaced apart side rails and a plurality of rungs attached at their ends to the side rails. The side rails each include a generally rectangular side rail tube having angularly disposed reinforcing webs integrally formed within the tube. A plurality of weight reducing apertures are formed in the sidewalls of the tube and are longitudinally spaced at predetermined intervals. The rungs include a tube with an integral reinforcing web extending parallel to the sidewalls of the tube. A portion of the sidewalls of the ladder rung tube are removed by milled slots. The rungs are pivotally attached to the side rails to allow the ladder to be collapsed down to a folded condition.

REFERENCES:
patent: 195440 (1877-09-01), Boyington
patent: 816914 (1906-04-01), Hinckley
patent: 1656871 (1928-01-01), Schnitzer
patent: 2776080 (1957-01-01), Hopfeld
patent: 3722622 (1973-03-01), Lauring
patent: 3773143 (1973-11-01), Prete

Affiliated with

Also associated with

Rating

Metal ladder construction with reinforced side rails does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Metal ladder construction with reinforced side rails, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metal ladder construction with reinforced side rails will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-446236