B - Operations – Transporting – 25 – J
Patent
B - Operations, Transporting
25
J
B25J 18/00 (2006.01) B25J 19/00 (2006.01)
Patent
CA 2173562
A support arm has stationary support structure, a boom, a knuckle and an auxiliary jib section. The boom connects at one end to the support structure and at an opposite end to one end of the knuckle, and an opposite end of the knuckle connects to one end of the auxiliary jib section. Each connection is a pivotal connection for pivoting about vertical pivot axes. An opposite end of the auxiliary jib section connects to a main jib section through a pivotal connection for pivoting about a horizontal axis. First and second flexible tubes connect across the knuckle and the auxiliary jib section between the boom and the main jib section. The flexible tubes extend from points on the main jib section in parallel horizontally spaced relationship and pass slippingly and in parallel longitudinally through parallel horizontally spaced guide sleeves that are connected on the auxiliary jib section. In the region of the knuckle the flexible tubes converge and cross over one another in a loosely curved configuration toward horizontally spaced points on the opposite end of the boom. A drive adjusts the elevation of the main jib section by pivoting it about the horizontal pivot axis, between an upper position parallel to the boom and a lower position inclined downwardly thereto. This arrangement allows vertical rise and fall of the main jib section and pivoting of the jib horizontally relative to the boom.
Hansen Henning
Ridout & Maybee Llp
LandOfFree
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