Patent · US Active

Chisel

US10227870B2 · kind B2 · utility

5Cited by

7References

19Claims

0Family size

Assignees

Betek GmbH & Co. KG · DE
Wirtgen GmbH

Inventors

Thomas Lehnert · Oberraden, DE
Karsten Buhr · Willroth, DE
Cyrus Barimani · Rübhausen, DE
Heiko Friederichs · Schenkenzell, DE
Karl Kammerer · Fluorn-Winzeln, DE
Markus Roth · Schenkenzell, DE

Key dates

Filing date	Sep 1, 2014
Grant date	Mar 12, 2019
Priority date	—
Expiry date	Sep 17, 2034

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/19
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

The invention relates to a chisel (10) having a chisel head (11) and a chisel shaft (17), wherein near its end facing away from the chisel head the chisel shaft has a threaded portion having a thread (19), wherein the chisel head holds a chisel tip (20) made of a hard material, and wherein near the side facing the chisel shaft the chisel head is provided with a supporting surface (15). Especially when superhard hard materials are used for the chisel tip, a load-optimized chisel design is obtained by a domed supporting surface (15).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.