Patent · US Expired

Drill bit having radially extending cutting bits on radial legs

US7497282B2 · kind B2 · utility

6Cited by

5References

4Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Rainer Batliner · Schaanwald, LI
Olaf Koch · Kirchdorf an der Krems, AT
Karl Hofmann · Neckarrems, DE
Werner Britten · Riegelsberg, DE

Key dates

Filing date	Jun 9, 2005
Grant date	Mar 3, 2009
Priority date	—
Expiry date	Apr 27, 2026

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23B2251/50
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A drill bit for a hammer drill for drilling in stone, concrete and the like includes a drill bit head formed as a hard material body with radial legs and having at least three radially extending cutting bits formed on the radial legs, and a centering tip in a center of the hard material body and projecting beyond one of the cutting bits, with the centering tip having concave limiting surfaces stretching between the linearly extending auxiliary cutting edges.

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