A device and a method for moving a jet member

E - Fixed Constructions – 01 – C

Patent

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E01C 23/12 (2006.01)

Patent

CA 2653164

A device for moving a jet member on a carriage (6) between two selectable extreme positions along a guide (5) has means for detecting that the carriage has reached a selectable extreme position, said means comprising members (24, 25) adapted to form a mechanical resistance against continued movement of the carriage so as to influence the flow of hydraulic liquid in an hydraulic circuit (27) of a hydraulic drive arrangement for moving the carriage. Members (31 ) are arranged to sense a parameter of the hydraulic liquid, the magnitude of which is depending upon the flow of hydraulic liquid in the hydraulic circuit, and send information about the magnitude of this parameter to a control unit (14) adapted to control the turning of the carriage on the basis of this information.

L'invention concerne un dispositif de déplacement d'un élément de projection sur un chariot (6) entre deux positions extrêmes sélectionnables le long d'un guide (5), lequel dispositif est doté de dispositifs de détection de position sélectionnable extrême du chariot , lesdits dispositifs comprenant des éléments (24, 25) formant une résistance mécanique au mouvement continu du chariot de façon à influencer l'écoulement de fluide hydraulique dans un circuit hydraulique (27) d'un dispositif d'entraînement hydraulique servant à déplacer le chariot. Des éléments (31) sont disposés de manière à détecter un paramètre du liquide hydraulique, dont la magnitude dépend de l'écoulement de liquide hydraulique dans le circuit hydraulique, et à envoyer des informations sur la magnitude de ce paramètre à une unité(14) qui commande la rotation du chariot sur la base de ces informations.

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