Patent · US Expired

Rock drill

US5265688A · kind A · utility

15Cited by

7References

6Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Gerhard Rumpp · Herrsching am Ammersee, DE
Josef Obermeier · Peiting, DE
Josef Fuenfer · Königsbrunn, DE

Key dates

Filing date	Aug 17, 1992
Grant date	Nov 30, 1993
Priority date	—
Expiry date	Aug 17, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9097
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A rock drill has an axially extending shank (1) with a drill head (2) on one end. The drill head (2) has an end face (3) with a cutting blade (4) and cutting pins (5) extending outwardly from the end face in the drilling direction. The cutting blade (4) extends diametrically across the end face and projects radially outwardly from the drill head (2) and axially outwardly from the end face (3). The cutting pins (5) are arranged on a diameter of the drill head which forms an acute angle relative to the cutting blade (4). Due to the acute angle between the cutting pins and the diametrically arranged cutting blade, removal grooves extending axially from the end face can be enlarged.

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