Safety arrangement on hydraulic piston-cylinder units

F - Mech Eng,Light,Heat,Weapons – 15 – B

Patent

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Details

F15B 20/00 (2006.01) E02F 9/24 (2006.01) F15B 15/28 (2006.01) E02F 3/36 (2006.01)

Patent

CA 2161972

The invention relates to a safety arrangement on hydraulic piston-cylinder units. In particular for monitoring locking cylinders, e.g. of operating tools mounted on a grab bucket boom. A sensor for monitoring the piston position is provided on thehydraulic piston-cylinder unit and is coupled electrically to a monitoring circuit for triggering an alarm arrangement if the piston is incorrectly positioned. The sensor (3) is coupled to an electrically actuatable locking valve (2) coupled to the monitoring circuit (9) for controlling the hydraulic piston-cylinder unit (1).

L'invention concerne un dispositif de sécurité monté sur des unités hydrauliques piston-cylindre, et servant notamment à surveiller le fonctionnement de vérins de blocage, par exemple d'outils de travail montés sur la flèche d'une pelle. Il est prévu, sur l'unité hydraulique piston-cylindre, un détecteur destiné à surveiller la position du piston, qui est couplé électriquement à un circuit de surveillance destiné à déclencher un dispositif d'alarme en cas de mauvaise position du piston. Une soupape d'arrêt (2) actionnable électriquement et couplée au circuit de surveillance (9) est couplée au détecteur (3) pour assurer la commande de l'unité hydraulique piston-cylindre (1).

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