Apparatus and method for improving the control of a concrete...

E - Fixed Constructions – 01 – C

Patent

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E01C 19/22 (2006.01) E01C 19/30 (2006.01)

Patent

CA 2519775

A soft landing control system (10) for a screeding device (12) is operable to automatically lower a vibrating member (24) of a screed head assembly (14) into engagement with a concrete surface at a time and place where the vibrating member is not positioned over an overlap area of already screeded concrete. The vibrating member is automatically lowered onto newly placed concrete at or near the junction or cold-joint between the already screeded concrete and the area of newly placed concrete, so as to avoid depressions in the already placed concrete. Optionally, the soft landing control system may include a timing device and may lower the vibrating member after a period of time following an activating event. Optionally, the control system may detect when the vibrating device is positioned at or near the newly placed concrete and may lower the vibrating member in response to such detection.

L'invention concerne un système de commande de réception en douceur (10) pour un dispositif d'arasement (12), lequel système permet d'abaisser automatiquement un élément vibrant (24) d'un ensemble tête d'arasement (14) de façon qu'il vienne en contact avec une surface de béton à un moment et à un emplacement où l'élément n'est pas positionné au-dessus d'une zone de chevauchement de béton déjà arasé. L'élément vibrant est automatiquement abaissé sur du béton fraîchement posé au niveau ou à proximité de la jonction ou du joint de reprise entre le béton déjà arasé et la zone de béton fraîchement posé, de façon à éviter la formation de dépressions dans le béton déjà posé. Eventuellement, ce système de réception en douceur peut comprendre un dispositif de chronométrage et abaisser l'élément vibrant après une période définie consécutive à un événement d'activation. Eventuellement, ce système de commande peut détecter le moment ou le dispositif vibrant est positionné au niveau ou à proximité du béton fraîchement posé et abaisser l'élément vibrant en réponse à cette détection.

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