| 摘要 |
a) Spreading boom for road covering products, which boom is intended to equip a spreading vehicle and is composed of at least two boom elements (1) which can be moved transversely between a rest position inside the width of the vehicle and a deployed spreading position, each element equipped with spreading nozzles (2) being connected to a product supply with a return for product in excess or in flow when the nozzles are closed. b) Boom, characterised in that each boom element (1) is connected to an articulated arm formed by at least two branches (6, 8) having double flow or products, these two branches being connected to each other as well as to the supply and to the boom element (1), each by an articulation having rotating connection and double flow (5, 7, 9, 20), and the boom element (1) itself has double flow, the arrival and departure of the spreading product to and from the boom element (1) occurring through the same articulation having rotating connection (9) having double flow. <IMAGE>
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