Patent · US Expired

Point chisel

US6981496B2 · kind B2 · utility

23Cited by

6References

11Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Jozsef Szendrovari · Kecskemét, HU
Werner Britten · Riegelsberg, DE
Jozsef Varga · Nagydobsza, HU

Key dates

Filing date	Sep 23, 2003
Grant date	Jan 3, 2006
Priority date	—
Expiry date	Sep 23, 2023

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/215
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A point chisel for use with a power tool includes an elongate stem (1) having, at its power tool side a shank (2) for securing the chisel in the power tool and, at its workpiece side, a useful region (3) having its outer diameter (H) tapering toward its workpiece end and having a cross-section (5) formed as a concave polygon by a plurality of axial grooves (4) extending radially toward a core diameter (K) that likewise tapers toward the workpiece side end of the useful region (3).

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