Cutting tool for breaking hard material, and a cutting cap therefor
AssigneeSandvik Rock Tools, Inc.
InventorKent Peay
Life of this patent
Estimating the term…
Abstract
A rotatable tool for breaking hard material includes an elongated tool body and a cutting cap mounted on the tool body. The cutting cap includes a generally conical front tip having a maximum first diameter (d), and a rear base portion having an outer peripheral surface defining a maximum second diameter (D). An intermediate portion extends from the tip to the base, and at least a part of the intermediate portion has a concave outer peripheral surface. A longitudinal extent (H) of the cap extends from a front end of the tip to a rear end of the outer peripheral surface of the base. A ratio of d to D is equal to or greater than 0.7. A ratio of H to D is equal to or greater than 1.0.
Claims11
A rotatable tool for breaking hard material, comprising:
- an elongated tool body;
- and
- a cutting cap formed of hard metal defining a longitudinal axis and including:
- a generally conical front tip having a maximum first diameter (d),
- a rear base portion having an outer peripheral surface defining a maximum second diameter (D), and a rearwardly facing surface bonded to a front end of the tool body, and
- an intermediate portion extending from the tip to the base and defining an abrupt transition from the tip, at least part of the intermediate portion having a concave outer peripheral surface,
- a longitudinal extent (H) of the cap extends from a front end of the tip to an intersection of the rearwardly facing surface with the maximum second diameter,
- wherein d/D≧0.7 and H/D≧1.0.
A cutting cap adapted to be mounted on a rotatable tool body for breaking hard material, the cutting cap formed of a hard metal and defining a longitudinal axis, the cutting cap comprising:
- a generally conical front tip having a maximum first diameter (d),
- a rear base portion having an outer peripheral surface defining a maximum second diameter (D), and a rearwardly facing surface adapted to be bonded to a front end of the tool body, and
- an intermediate portion extending from the tip to the base and defining an abrupt transition from the tip, at least part of the intermediate portion having a concave outer peripheral surface,
- a longitudinal extent (H) of the cap extends from a front end of the tip to an intersection of the rearwardly facing surface with the maximum second diameter,
- wherein d/D≧0.7 and H/D≧1.0.
Dependencies are inferred from the claim text.