Cutting tip and tool

E - Fixed Constructions – 21 – C

Patent

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Details

E21C 35/18 (2006.01)

Patent

CA 2699539

A cutting tip (10) for a mechanical excavator comprises a tip body (11) having a generally pointed distal end (12), a proximal end (13) spaced from the distal end, and a wall (14) that diverges outwardly from the distal end towards the proximal end. The wall (14) is profiled to induce a non-uniform stress profile on the material impacted by the cutting tip to facilitate radial cracking in that material. In one form, the wall (14) is profiled to include a plurality of ridges (15) and intermediate regions (16), with the ridges (15) being arranged to induce a higher stress concentration in the impacted material than the intermediate regions (16).

La présente invention concerne une tête de coupe (10) qui équipe un excavateur mécanique constitué d'un corps de tête (11) ayant une extrémité distale généralement pointue (12), une extrémité proximale (13) séparée de l'extrémité distale et une paroi (14) qui diverge vers l'extérieur à partir de l'extrémité distale vers l'extrémité proximale. La paroi (14) est profilée de manière à induire un profil contraint non uniforme sur le matériau touché par la tête coupante afin de faciliter la fissuration radiale du matériau. Dans une forme de réalisation de l'invention, la paroi (14) est profilée de manière à comprendre une pluralité d'arêtes (15) et de régions intermédiaires (16), les arêtes (15) étant disposées de telle manière qu'elles exercent une contrainte plus importante sur le matériau touché que ne le font les régions intermédiaires (16).

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