Drilling tool

Inventors: Stefan Sonntag (Vogt, DE); Rainer Widmann (Bodnegg, DE); Andreas Schurig (Lyss, CH); Alexander Volz (Baienfurt, DE); Tamara Gaschler (Ravensburg, DE)

Assignee: Robert Bosch GmbH

B23Q11/0046 B23B45/003

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 12708969
App. No.: 18/556,933
Granted: Aug 18, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

A drilling tool, in particular a rock drill, extends along a longitudinal axis and includes a drill head, an insertion end, a main body, a cover element, a transport region which is located between the drill head and the insertion end, and at least one transport channel which extends along the transport region. The transport channel is located radially between the cover element and the main body. The cover element includes at least one interior region, which is located inside the main body, and at least one exterior region which is located outside the main body.

Claims (36)

1 . A drilling tool, that extends along a longitudinal axis, the drilling tool comprising:

a drill head;

an insertion end;

a main body;

a cover element comprising at least one exterior region located outside the main body;

a transport region located between the drill head and the insertion end; and

at least one transport channel extending along the transport region, the at least one transport channel located radially between the cover element and the main body,

wherein the cover element comprises at least one interior region located inside the main body.

2 . The drilling tool according to claim 1 , wherein the at least one exterior region of the cover element includes a cutter configured to generate a drill hole.

3 . The drilling tool according to claim 2 , wherein a distance of the cutter from the longitudinal axis corresponds to at least 45% of a diameter of the drill head.

4 . The drilling tool according to claim 2 , wherein the cutter is pointed or blunt.

5 . The drilling tool according to claim 2 , wherein the cover element comprises a single cutter.

6 . The drilling tool according to claim 2 , wherein the cover element comprises at least two cutters.

7 . The drilling tool according to claim 2 , wherein one interior region is, or two interior regions are, located adjacent the cutter.

8 . The drilling tool according to claim 2 , wherein a midpoint angle with the longitudinal axis of the drilling tool acting as a midpoint and with transition regions of the cutter acting as endpoints is less than 20°.

9 . The drilling tool according to claim 2 , wherein:

the cutter is curved, and

the cover element has a smaller radius than the main body.

10 . The drilling tool according to claim 1 , wherein a ratio between the at least one exterior region and the at least one interior region in cross-section is in a range between 10 and 1/10.

11 . The drilling tool according to claim 1 , wherein the at least one transport channel includes only a single transport channel.

12 . The drilling tool according to claim 1 , wherein the cover element has a width greater than a width of the at least one transport channel in cross-section.

13 . The drilling tool according to claim 1 , wherein:

the at least one transport channel in cross-section has a maximum height extending along a diameter of the main body and a maximum width extending perpendicular to the diameter of the main body, and

the maximum height is greater than the maximum width.

14 . The drilling tool according to claim 13 , wherein the maximum height of the at least one transport channel corresponds to at least 40% of the diameter of the main body.

15 . A drilling tool, that extends along a longitudinal axis, the drilling tool comprising: