Friction rock stabilizers

E - Fixed Constructions – 21 – D

Patent

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Details

E21D 21/00 (2006.01)

Patent

CA 2180878

A rock stabilizer of this invention includes an elongated metal tube, which is substantially circular in cross-section and a circumferential outwardly projecting stop at or adjacent one end of the tube and is characterised in that the stabilizer tube includes an open slot which extends over the length of the tube and through the stop to enable the tube and the stop to be reduced in diameter by closure of the slot in use and a metal ring which at least partially surrounds the tube and extends across the slot at the stop with the tube being movable relatively to the ring in its circumferential direction to enable the tube and stop to be reduced in diameter in use. Conveniently the stop is integral with the tube material and is provided by shortening the tube in the zone of the stop.

Le stabilisateur de roc de la présente invention comprend un tube métallique allongé de section substantiellement circulaire et une butée faisant saillie sur la circonférence extérieure à un bout du tube ou près du bout et se caractérise du fait que le tube du stabilisateur comporte une fente ouverte qui s'étend sur la longueur du tube et traverse la butée pour permettre de réduire le diamètre du tube et de la butée en usage et un anneau métallique qui entoure au moins partiellement le tube et traverse la fente au niveau de la butée, le tube pouvant bouger relativement à l'anneau dans le sens de sa circonférence de manière à permettre la réduction du diamètre en usage du tube et de la butée. La butée fait commodément partie intégrante du tube et est réalisée par raccourcissement du tube dans la zone de la butée.

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