Lockable hinge for foldable ladder

E - Fixed Constructions – 04 – F

Patent

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Details

E04F 11/06 (2006.01) E05D 11/10 (2006.01) E06C 1/18 (2006.01) E06C 1/32 (2006.01) E06C 7/50 (2006.01)

Patent

CA 2534533

A hinge for a foldable ladder, comprising: first and second hinge plates (440, 450) rotatably connected by a shaft (410) and defining a cavity; a hinge latch (460) translatable between a locked position and an unlocked position and disposed at least partially within said cavity, said hinge latch comprising a first opening configured to receive a first biasing member (408), a second opening (464) configured to receive a locking member (902), and a locking portion (461) protruding from said hinge latch; and a locking member (902) to engage said second opening when said hinge latch is moved into said unlocked position by means of said first biasing member (408) and to secure said hinge latch in said unlocked position. Rotational movement of a plate relative to the other is permitted when said hinge latch is secured in said unlocked position by means of said locking member (902).

L'invention concerne une charnière pour échelle coulissante, cette charnière comprenant les éléments suivants: une première et une deuxième plaque de charnière (440, 450) reliées en rotation par une tige (410) et définissant une cavité; un loquet de charnière (460) à mouvement translationnel entre une position verrouillée et une position déverrouillée et disposé au moins partiellement à l'intérieur de la cavité, ce loquet de charnière comprenant une première ouverture conçue pour recevoir un premier élément de sollicitation (408), une deuxième ouverture (464) conçue pour recevoir un élément de verrouillage (902) et une partie verrouillage (461) en saillie relativement au loquet. Cet charnière comporte également un élément de verrouillage (902) solidaire de la deuxième ouverture lorsque le loquet de charnière est mis en position déverrouillée au moyen du premier élément de sollicitation (408), cet élément de verrouillage fixant le loquet de charnière en position déverrouillée. Il est ainsi possible de faire tourner une plaque relativement à l'autre lorsque le loquet de charnière est fixé en position déverrouillée au moyen de l'élément de verrouillage (902).

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