Patent · US Expired

Apparatus for rock drill

US4883135A · kind A · utility

7Cited by

9References

19Claims

0Family size

Assignee

Hawera Probst GmbH · DE

Inventors

Bernhard Moser · Altshausen, DE
Wolfang Peetz · Blitzenreute, DE
Hermann Hugger · Altshausen, DE

Key dates

Filing date	Aug 24, 1988
Grant date	Nov 28, 1989
Priority date	—
Expiry date	Aug 24, 2008

Classification

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

Abstract

A rock drill for rotary and percussive stressing exhibits equally good or improved transport characteristics of driling dust for a smaller transport groove as compared with prior rock drills. In order to achieve this, a main transport groove having longitudinal profiles is formed, with an interrupted secondary transport groove integrated in the main transport groove, the transport ribs of which exhibit a greater angle of twist than the angle of twist of the main transport groove.

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