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US 7,001,120 B2Granted
Drilling tool
AssigneeHawera Probst GmbH & Co.
InventorsBernhard Moser, Rainer Widmann, Marco Lang
Life of this patent
Estimating the term…
Abstract
The invention relates to a drilling tool (36), in particular for working concrete, rock, masonry and suchlike materials, having a single- or multi-edge tool head with at least one cutting body (1) which comprises a central region (12) which is designed in a roof shape, has rake faces and flanks and is defined laterally by two outer regions (13, 14) set back in the effective direction of the drill. In this case, the ground surfaces of the central region (12) form a pyramidal point (15) while avoiding the formation of a chisel edge.
Claims21
A drilling tool, comprising:
- a single- or multi-edge tool head with at least one cutting body having cutting edges, the cutting body having
- a central region which is designed in a roof shape with rake faces and flanks;
- and
- two outer regions set back relative to the central region in a drilling direction of the drill, one outer region being positioned on either side of the central region in a direction perpendicular to the drilling direction,
- wherein the rake faces and flanks of the central region form a pyramidal point having a rounded-off tip and form non-chisel edges.
2 more elements
A drilling tool, comprising:
- a single- or multi-edge tool head with at least one cutting body having cutting edges, the cutting body having
- a central region which is designed in a roof shape with rake faces and flanks, the central region having a point angle of about 135°;
- and
- two outer regions set back relative to the central region in a drilling direction of the drill, one outer region being positioned on either side of the central region in a direction perpendicular to the drilling direction, the outer regions having a point angle of about 155°,
- wherein the rake faces and flanks of the central region form a pyramidal point and form non-chisel edges.
2 more elements
A drilling tool, comprising:
- a single- or multi-edge tool head with at least one cutting body having cutting edges, the cutting body having
- a central region which is designed in a roof shape with rake faces and flanks;
- and
- two outer regions set back relative to the central region in a drilling direction of the drill, one outer region being positioned on either side of the central region in a direction perpendicular to the drilling direction,
- wherein the rake faces and flanks of the central region form a pyramidal point and form non-chisel edges, and the cutting edges in the outer region are formed by planar or rounded-off bevels having a width that decreases radially outward.
2 more elements
A drilling tool, comprising:
- a single- or multi-edge tool head with at least one cutting body having cutting edges, the cutting body having
- a central region which is designed in a roof shape with rake faces and flanks;
- and
- two outer regions set back relative to the central region in a drilling direction of the drill, one outer region being positioned on either side of the central region in a direction perpendicular to the drilling direction,
- wherein the rake faces and flanks of the central region form a pyramidal point and form non-chisel edges, and the cutting edges in the outer region are formed by planar or rounded-off bevels having a width that increases radially outward.
2 more elements
A drilling tool, comprising:
- a single- or multi-edge tool head with at least one cutting body having cutting edges, the cutting body having
- a central region which is designed in a roof shape with rake faces and flanks;
- and
- two outer regions set back relative to the central region in a drilling direction of the drill, one outer region being positioned on either side of the central region in a direction perpendicular to the drilling direction,
- wherein the rake faces and flanks of the central region form a pyramidal point and form non-chisel edges, and wherein a lateral surface of a cone through the cutting edges of the central region is at a distance from a lateral surface of a cone through the cutting edges of the outer region in the axial direction.
2 more elements
Dependencies are inferred from the claim text.