Tooth for roller crusher
AssigneeBradken Canada Ltd.
InventorsJonathan Daniel Curlett, Nolan Brian Serink
Life of this patent
Estimating the term…
Abstract
An improved tooth for a roller crusher is presented. The tooth can include a first tungsten carbide overlay layer plasma-transfer arc welded on a recessed hemispherical end of the tooth, which is covered by a wearable cap placed over the first overlay layer, the cap welded to the tooth. A second tungsten carbide overlay layer can then be plasma-transfer arc welded over the cap to, thereby, provide a tooth having two tungsten carbide overlay wear layers.
Claims23
A tooth for a roller crusher, the tooth comprising:
- a) an attachment end configured for releasable attachment to the roller crusher, a waist and a conical body extending from the waist away from the attachment end;
- b) a recessed hemispherical end disposed on the conical body;
- c) a first terrace disposed on the tooth adjacent to the recessed spherical end;
- d) a second terrace disposed on the tooth between the first terrace and the conical body;
- e) a first tungsten carbide layer disposed on the spherical end;
- f) a cap disposed on the spherical end, the cap covering the first tungsten carbide layer;
- and
- g) a second tungsten carbide layer disposed on the cap.
An improved platen for a roller crusher, the platen comprising a bottom surface for attachment to the roller crusher and a convex surface disposed above the bottom surface, the platen further comprising a plurality of tooth bases disposed on the convex surface, the improvement comprising at least one improved tooth disposed in one of the tooth bases, each improved tooth comprising:
- a) an attachment end configured for releasable attachment to one of the tooth bases, a waist and a conical body extending from the waist away from the attachment end;
- b) a recessed hemispherical end disposed on the conical body;
- c) a first terrace disposed on the tooth adjacent to the recessed spherical end;
- d) a second terrace disposed on the tooth between the first terrace and the conical body;
- e) a first tungsten carbide layer disposed on the spherical end;
- f) a cap disposed on the spherical end, the cap covering the first tungsten carbide layer;
- and
- g) a second tungsten carbide layer disposed on the cap.
An improved roller crusher, the crusher comprising a drum configured to receive a plurality of platens, each platen comprising a bottom surface for attachment to the roller crusher and a convex surface disposed above the bottom surface, the platen further comprising a plurality of tooth bases disposed on the convex surface, the improvement comprising at least one improved tooth disposed in one of the tooth bases, each improved tooth comprising:
- a) an attachment end configured for releasable attachment to one of the tooth bases, a waist and a conical body extending from the waist away from the attachment end;
- b) a recessed hemispherical end disposed on the conical body;
- c) a first terrace disposed on the tooth adjacent to the recessed spherical end;
- d) a second terrace disposed on the tooth between the first terrace and the conical body;
- e) a first tungsten carbide layer disposed on the spherical end;
- f) a cap disposed on the spherical end, the cap covering the first tungsten carbide layer;
- and
- g) a second tungsten carbide layer disposed on the cap.
A tooth comprising:
- a) an attachment end configured for attachment to a base, a waist and a conical body extending from the waist away from the attachment end;
- b) a recessed hemispherical end disposed on the conical body;
- c) a first terrace disposed on the tooth adjacent to the recessed spherical end;
- d) a second terrace disposed on the tooth between the first terrace and the conical body;
- e) a first tungsten carbide layer disposed on the spherical end;
- and
- f) a cap disposed on the spherical end, the cap covering the first tungsten carbide layer.
Dependencies are inferred from the claim text.