Mechanical device ensuring irreversibility in a limiter...

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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F16K 31/04 (2006.01) H01H 3/16 (2006.01)

Patent

CA 2050222

A mechanical device forming part of the limiter assembly associated with reversible electric actuators, typically for controlling pipeline valves, comprises a mechanism by which one or more limiters can be held in the engaged position even after the trigger has been deactivated; the undesirable phenomenon of pumping (the effect of the actuator motor cutting in and out repeatedly) is prevented by a simple flexible ribbon with teeth positioned in such a way as to engage corresponding sprockets that are capable of rotation on their respective shafts in one direction only.

Dispositif mécanique faisant partie d'un ensemble limiteur relié à des actionneurs électriques réversibles servant surtout à contrôler les vannes d'un pipeline, comportant un mécanisme grâce auquel un ou plusieurs limiteurs peuvent être maintenus en prise même après que le mécanisme de déclenchement est désactivé; le phénomène de pompage non souhaité (effet de l'actionneur mis en modes marche et arrêt de façon répétée) est éliminé au moyen d'une simple bande souple munie de dents placées de manière à être en prise avec les pignons correspondants, qui peuvent tourner sur leur arbre respectif dans une seule direction.

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