Patent · US Expired

Drilling tool

US6032749A · kind A · utility

9Cited by

2References

9Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Hans-Werner Bongers-Ambrosius · Munich, DE
Rainer Batliner · Schaanwald, LI
Dietmar Sartor · Colmar, FR
Harald Geiger · Schwanau, DE
Anton Knoller · Landsberg, DE

Key dates

Filing date	Dec 5, 1997
Grant date	Mar 7, 2000
Priority date	—
Expiry date	Dec 5, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23B2251/50
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A drilling tool has a shank (1) at one end, a shaft (2) with two helical grooves (5, 6) and the shaft (2) extends from the shank to the other end of the drilling tool. A drill head (8), with a cutting plate (7) inserted in it, is located at the opposite end of the shaft (2) from the shank (1). The cutting plate (7) has a cutting tip (74) projecting axially outwardly from the drill head (8). The cutting plate has a dimension (B) extending perpendicularly to the axis of the drilling tool and the dimension (B) is greater than the diameter of the drill head (8). On the opposite sides of the cutting plate (7) there is a reinforcement section (71) projecting outwardly from the side of the cutting plate and spaced laterally from the ends of the grooves (5, 6) in the drill head.

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