Patent · US Expired

Drill bit having hollow cylindrical body and a plurality of PCD cutting elements

US4667755A · kind A · utility

12Cited by

11References

19Claims

0Family size

Assignee

Hawera Probst GmbH · DE

Inventors

Norbert M/u/ ller · Aulendorf, DE
Anton Scheuch · Ravensburg, DE

Key dates

Filing date	Feb 26, 1985
Grant date	May 26, 1987
Priority date	—
Expiry date	Feb 26, 2005

Classification

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

Abstract

A drill bit, hvaing heavy-duty cutting elements, is proposed which is intended for rotary, air-cooled application. So that the drill bit can be operated with a relatively low thrust pressure, PCD cutting elements (14) are provided which only slightly overlap the thin-walled cylinder (11, 12) to produce an air gap for cooling and for conveying the drilling dust.

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