Patent · US Expired

Rock drill

US6450272B2 · kind B2 · utility

5Cited by

9References

10Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Udo Hauptmann · Landsberg am Lech, DE
Josef Starkmann · Hurlach, DE
Karl Hofmann · Neckarrems, DE
Tim Pröls · Munich, DE

Key dates

Filing date	Feb 7, 2001
Grant date	Sep 17, 2002
Priority date	—
Expiry date	Feb 7, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23B2251/241
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A drill including a body having mortises (7), and a solid hard metal head (4) having a plurality of bits (3) and secured to the drill body over the end surface (5) of the head (4) and additionally secured to the drill body over portions of side surfaces (6) of the bits, which are located in a radially outer region of the head (4), with the side surfaces (6) extending into mortises and including first surfaces, which are associated with at least some of the bits (3) and are subjected to pressure acting in a rotational direction of the drill during operation of the drill.

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