Extension ladder, combination end cap/guide bracket, and...

E - Fixed Constructions – 06 – C

Patent

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Details

E06C 7/42 (2006.01) E06C 1/12 (2006.01)

Patent

CA 2210162

An extension ladder comprises a base section comprising a first base rail, a second base rail in spaced relationship and in parallel with the first base rail, and at least a first base rung connected to the first base rail and the second base rail. The extension ladder also comprises a fly section slidably connected to the base section. The fly section comprises a first fly rail, a second fly rail in spaced relationship and in parallel with the first fly rail, at least a first fly rung connected to the first fly rail and the second fly rail, a first combination end cap/guide bracket connected to the bottom of the first fly rail, and a second combination end cap/guide bracket connected to the bottom of the second fly rail. Each end cap/guide bracket is one continuous piece. The first fly rail is adjacent to and in parallel with and in spaced relationship with said first base rail. The second fly rail is adjacent to and in parallel with and in spaced relationship with said second base rail. The first and second combination end cap/guide bracket prevents the fly section separating from the base section and capping the bottom end of the first fly rail and second fly rail, respectively. A combination end cap/guide bracket comprises a back wall. Additionally, the end cap/guide bracket comprises an end closure portion preferably with a slot connected to the back wall. The end cap/guide bracket also comprises a hook portion having a hook connected to the back wall and extending perpendicularly from the end closure portion. Additionally, the end cap/guide bracket comprises a block portion which is disposed adjacent and in parallel with the hook of the hook portion and preferably defines a first channel with the hook. A method for climbing comprises the steps of moving a fly section along a base section while being engaged with the base section by sliding a first channel that is connected to an end closure portion attached at the end of each fly rail of the fly section along the flange of each respective base rail of the base section to a desired portion relative to the base rail. Then, there is the step of placing the fly section and connected base section upright against a support but at an angle relative to the support.

Cette invention concerne une échelle coulissante comprenant une section inférieure composée d'un premier rail et d'un second rail, espacés latéralement et parallèles, et d'au moins un barreau d'échelle fixé aux deux rails susmentionnés. L'objet de l'invention comprend également une section coulissante raccordée à la section inférieure. La section coulissante se compose d'un premier et d'un second rails coulissants, espacés latéralement et parallèles, et d'au moins un barreau d'échelle fixé aux deux rails coulissants. Au bas de chacun de ces rails coulissants se trouve un capuchon d'extrémité/ferrure de guidage combiné monobloc. Le premier rail coulissant est contigu et parallèle au premier rail inférieur correspondant. Le second rail coulissant est également contigu et parallèle au second rail inférieur correspondant. Les deux capuchons d'extrémité/ferrures de guidage combinés empêchent la section coulissante de se séparer de la section inférieure et servent, respectivement, à fermer la base des deux rails coulissants. Le capuchon d'extrémité/ferrure de guidage combiné comporte une paroi arrière et, en plus, une pièce d'obturation comportant de préférence une fente se prolongeant jusque dans la paroi arrière. Le capuchon d'extrémité/ferrure de guidage comprend également un crochet raccordé à la paroi arrière et perpendiculaire à la pièce d'obturation. En plus, le capuchon d'extrémité/ferrure de guidage comprend un bloc adjacent et parallèle au crochet susmentionné et définissant, de préférence, un premier profilé en U de concert avec ledit crochet. Une méthode d'extension de l'échelle comprend le déplacement de la section coulissante le long de la section inférieure, ladite section coulissante étant imbriquée dans la section inférieure, en faisant glisser le premier profilé en U, qui est raccordé à la pièce d'obturation à l'extrémité de chacun des rails coulissants, le long du rebord correspondant des rails inférieurs, jusqu'à la position désirée. Ensuite, il s'agit de relever l'échelle allongée et l'appuyer obliquement contre un point d'appui.

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