Patent · US Active

Hard material bit

US7549491B2 · kind B2 · utility

4Cited by

1References

5Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Klaus Hoeggerl · Finning, DE
Olaf Koch · Kirchdorf an der Krems, AT
Thorsten Assel · Landsberg, DE

Key dates

Filing date	Apr 25, 2007
Grant date	Jun 23, 2009
Priority date	—
Expiry date	Aug 2, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2101/20
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hard material bit for a rotary-percussion tool (2) includes at least one cutting edge (3), a bottom surface (6) located opposite the at least one cutting edge (3), and at least one attachment surface (8) and at least one free surface (10) both extending transverse to the bottom surface (6) and forming, respectively, a piecewise extending first chamfer (9a) and second chamfer (9b), with the second chamfer (9b) having a width greater than a width of the first chamfer (9a).

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