Articulated aerial work platform system

B - Operations – Transporting – 66 – F

Patent

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Details

B66F 11/04 (2006.01)

Patent

CA 2216142

An articulated aerial platform system (10) having a lift assembly including an upper parallelogram riser (22) and a lower parallelogram riser (20). The upper and lower risers (22, 20) are raised and lowered by a single riser cylinder (38) mounted between a base of the system (10) and the upper riser (22). Relative pivoting motion of the upper and lower risers (22, 20) is controlled by a timing link (76) interconnecting the upper and lower risers (22, 20). A work platform (28) mounted at the end of a jib (26) pivotally connected to a telescoping boom (24) pivotally connected to the upper riser (22) is leveled for boom motion by operation of a master cylinder (118) and slave cylinder (120) arrangement. The slave cylinder (120) is disposed in a generally vertical position. A jib cylinder (42) actuating motion of the jib (26) is connected across the diagonal of the jib (26).

Système articulé (10) de plate-forme élévatrice à ensemble élévateur comprenant un élément élévateur supérieur en forme de parallélogramme (22) et un élément élévateur inférieur en forme de parallélogramme (20). Ces éléments élévateurs supérieur et inférieur (22, 20) sont soulevés et abaissés par un vérin unique (38) monté entre une base du système (10) et l'élément supérieur (22). Le mouvement pivotant relatif des éléments élévateurs supérieur et inférieur (22, 20) est commandé par une articulation de synchronisation (76) interconnectant les éléments (22, 20). Une plate-forme de travail (28), montée à l'extrémité d'un bras (26) raccordé pivotant à une flèche télescopique (24) également raccordée pivotante à l'élément supérieur (22), est mise à niveau en vue du déplacement de la flèche par l'actionnement d'un système de vérin principal (118) et de vérin asservi (120). Le vérin asservi (120) est généralement placé dans une position verticale. Un vérin (42) mettant en mouvement le bras (26) est raccordé dans la diagonale du bras (26).

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