Boom assembly

E - Fixed Constructions – 02 – F

Patent

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Details

E02F 9/14 (2006.01)

Patent

CA 2579386

There is provided a boom assembly bent at the center in a longitudinal direction so as to form a round shape protruding upward when seen from the side, comprising; a front boom sub assembly (47), the front boom sub assembly constituting the front of the center in the longitudinal direction of said boom assembly; and a rear boom sub assembly (48), the rear boom sub assembly constituting the rear of the center in the longitudinal direction of the boom assembly, wherein the front boom sub assembly (47) and the rear boom sub assembly (48) are symmetric when seen from the side, and portions from the midway positions in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to the center in the longitudinal direction of the boom assembly (12) have upper surfaces of arc shape protruding upward when seen from the side, and portions from the middles in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to ends in the longitudinal direction of the boom assembly (12) have upper surfaces of linear shape when seen from the side.

Il s'agit d'un ensemble de bras articulé recourbé au centre dans une direction longitudinale de manière à former une forme ronde en saillie vers le haut, vu de profil, et comprenant: un sous-ensemble de bras articulé avant (47), lequel forme l'avant du centre dans le sens longitudinal de l'ensemble de bras articulé; et un sous-ensemble de bras articulé arrière (48), lequel forme l'arrière du centre dans la direction longitudinale de l'ensemble de bras articulé, le sous-ensemble de bras articulé avant (47) et le sous-ensemble de bras articulé arrière (48) étant symétriques, vus de profil, et les parties des positions intermédiaires dans le sens longitudinal du sous-ensemble de bras articulé avant (47) et du sous-ensemble de bras articulé arrière (48) au centre dans la direction longitudinale de l'ensemble de bras articulé (12) présentant des surfaces supérieures de forme d'arc faisant saillie vers le haut, vues de profil, et les parties au milieu dans le sens longitudinal du sous-ensemble de bras articulé avant (47) et du sous-ensemble de bras articulé arrière (48) aux extrémités dans le sens longitudinal de l'ensemble de bras articulé (12) présentant des surfaces supérieures de forme linéaire, vues de profil.

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