Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
TRESTLE LADDER
A ladder includes a first and second assembly, each including a pair of spaced apart rails and a set of rungs coupled to and extending between the spaced apart rails. A pair of brackets slidably receive a pair of the spaced apart rails. A pair of protrusions extend from those spaced apart rails and are movable into a pair of slots defined by a pair of retainers coupled with the other pair of spaced apart rails. The protrusions are movable into the slots while the ladder is in a step ladder configuration at a nonzero angle between the first and second assemblies, such as by moving the pair of retainers from a locking position to an unlocked position as the rails bearing the protrusions longitudinally slide relative to the pair of brackets. The ladder may also have spreaders with limited movement while collapsed and spaced apart rung retainers.
TRESTLE LADDER
A ladder includes a first and second assembly, each including a pair of spaced apart rails and a set of rungs coupled to and extending between the spaced apart rails. A pair of brackets slidably receive a pair of the spaced apart rails. A pair of protrusions extend from those spaced apart rails and are movable into a pair of slots defined by a pair of retainers coupled with the other pair of spaced apart rails. The protrusions are movable into the slots while the ladder is in a step ladder configuration at a nonzero angle between the first and second assemblies, such as by moving the pair of retainers from a locking position to an unlocked position as the rails bearing the protrusions longitudinally slide relative to the pair of brackets. The ladder may also have spreaders with limited movement while collapsed and spaced apart rung retainers.
TRESTLE LADDER
MAXFIELD B SCOTT (Autor:in) / MOSS N RYAN (Autor:in) / PENROD DARIUS S (Autor:in)
06.03.2025
Patent
Elektronische Ressource
Englisch
IPC:
E06C
LADDERS
,
Leitern