IP Library Granted Patent US 12,728,512
Granted Patent B2
US 12,728,512 · App. 18/453,368 · Granted Sep 8, 2026

Chisel

Inventors: Rainer Eggers (Altshausen, DE); Carsten Fuchsloch (Altshausen, DE)
Assignee: DREBO WERKZEUGFABRIK GMBH
B25D17/02B25D2222/42B25D2250/111
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Quick Facts
Patent No.
US 12,728,512
App. No.
18/453,368
Granted
Sep 8, 2026
Kind
B2
Abstract

A chisel including a body formed of a first material, the body including a first end having a shank, a second end having a protrusion, and a longitudinal axis extending through the first end and the second end. The chisel includes a head formed of a second material that is harder than the first material and including a first end coupled to the second end of the body and defining a recess that receives the protrusion, a second end that is opposite the first end of the head, a cylindrical portion that defines the first end of the head, and a conular portion that extends from the cylindrical portion and toward the second end of the head.

Claims (32)

1 . A chisel comprising:

a body formed of a first material, the body including

a first end having a shank,

a second end having a surface and a protrusion extending from the surface, and

a longitudinal axis extending through the first end and the second end; and

a head formed of a second material that is harder than the first material, the head including

a first end coupled to the second end of the body, the first end including a surface and a recess defined therein, the surface of the first end of the head abutting the surface of the second end of the body while the recess receives the protrusion,

a second end that is opposite the first end of the head,

a cylindrical portion that defines the first end of the head, and

a conular portion that extends from the cylindrical portion and toward the second end of the head.

2 . The chisel of claim 1 , wherein the cylindrical portion defines a continuous surface with the body.

3 . The chisel of claim 1 , wherein the protrusion is semi-spherical.

4 . The chisel of claim 1 , wherein the surface of the second end is a planar surface between the protrusion and an outer surface of the body, and wherein the planar surface is annular.

5 . The chisel of claim 1 , wherein the protrusion is conular.

6 . The chisel of claim 1 , wherein the second end of the head includes a plurality of ribs extending toward the first end of the head.

7 . The chisel of claim 4 , wherein the surface of the head is a planar surface between the recess and the outer surface of the cylindrical portion.

8 . A chisel comprising:

a body formed of a first material, the body including

a first end having a shank,

a second end having a protrusion, and

a longitudinal axis extending through the first end and the second end; and

a head formed of a second material that is harder than the first material, the head including

a first end coupled to the second end of the body and defining a recess that receives the protrusion,

a second end that is opposite the first end of the head,

a cylindrical portion that defines the first end of the head and having an outer surface that is continuous with an outer surface of the body, and

a conular portion that extends from the cylindrical portion and toward the second end of the head.

9 . The chisel of claim 8 , wherein the protrusion is semi-spherical.

10 . The chisel of claim 8 , wherein the second end of the body includes a surface between the protrusion and the outer surface of the body.

11 . The chisel of claim 10 , wherein the first end of the head includes a surface between the recess and the outer surface of the cylindrical portion.

12 . The chisel of claim 11 , wherein the surface of the head abuts the surface of body when the protrusion is received within the recess.

13 . The chisel of claim 12 , wherein the surface of the second end of the body is planar and annular, and wherein the surface of the first end of the head is planar and annular.

14 . The chisel of claim 8 , wherein the first end of the head abuts a surface at the second end from which the protrusion extends.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 11, 2026
From: EGGERS, RAINER; FUCHSLOCH, CARSTEN
To: DREBO WERKZEUGFABRIK GMBH
Reel/Frame 074926/0024 →
Continuity (3)
Provisional Application 63400082 · Aug 23, 2022
Provisional Application 63399914 · Aug 22, 2022
Related Publication 20240058934A1 · Feb 22, 2024
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