초록 ▼

A device which is to constitute a tubular duct includes a plurality of flexible tubular sections and a plurality of rigid tubular sections. Articulation units are provided between one section and the next. Each articulation unit includes a pair of brackets provided with fastening collars. The respec

A device which is to constitute a tubular duct includes a plurality of flexible tubular sections and a plurality of rigid tubular sections. Articulation units are provided between one section and the next. Each articulation unit includes a pair of brackets provided with fastening collars. The respective collars are secured to ends of the rigid sections, ends of a respective flexible section being mounted on skirts of the adjacent rigid sections. The brackets of each pair of brackets are pivotally connected to move about a first respective axis. At least one bracket of at least one pair is additionally mounted to pivot about an axis perpendicular to the first axis.

대표청구항 ▼

A device suitable to constitute at least a portion of tubular duct means comprising a plurality of rigid tubular sections and a plurality of unitary flexible tubular sections, the rigid tubular sections being alternated with the flexible tubular sections, articulation means including respective pair

A device suitable to constitute at least a portion of tubular duct means comprising a plurality of rigid tubular sections and a plurality of unitary flexible tubular sections, the rigid tubular sections being alternated with the flexible tubular sections, articulation means including respective pairs of brackets provided with fastening collars securing them respectively onto portions of respective ones of said rigid tubular sections in the vicinity of and spaced from ends thereof and on whose respective skirts defined by surfaces between said ends and respective ones of said fastening collars are connected opposite ends of an intermediate flexible tubular section of said plurality of unitary flexible tubular sections, each articulation means having at least one pivotal friction connection means between brackets of each of said pair of brackets which connection means defines a respective first axis, and wherein at least one of said articulation means includes means pivotally coupling one of its said fastening collars to one bracket of its said pair of brackets along a second axis substantially perpendicular to said first axis of said at least one articulation means.