A ram-based positioning system

B - Operations – Transporting – 62 – D

Patent

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Details

B62D 13/02 (2006.01) F15B 7/00 (2006.01) F15B 7/10 (2006.01) F15B 11/20 (2006.01)

Patent

CA 2471082

One aspect of the invention provides a positioning system comprising at least one master ram (26, 28) and respective slave ram (22, 24), at least one travel stop (36) and at least one pressure relief valve (68). The or each travel (36) stop is arranged to restrict the travel of one or more slave piston (22, 24) when the system is misaligned, at least one pressure relief valve (68) being arranged to vent excess pressure in the operating fluid arising as a result of such restriction. The positioning system is particularly suited for incorporation into a steering system, especially for an articulated vehicle (10).

Dans l'un de ses aspects, l'invention concerne un système de positionnement comprenant au moins une RAM principale et les RAM asservies correspondantes, au moins un limiteur de course et au moins une soupape de retour. Chaque limiteur de course est disposé de manière à restreindre la course d'au moins un piston asservi lorsque le système est décalé, au moins une soupape de retour étant disposée de manière à évacuer l'excès de pression dans le fluide de fonctionnement résultant d'un tel étranglement. Le système de positionnement peut en particulier être incorporé dans un système de direction, notamment d'un véhicule articulé.

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