Drilling head of a rock drill
US6843334B2 · kind B2 · utility
2Cited by
19References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 16, 2002 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Jan 16, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/58
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling head of a rock drill for use with a hand-held power tool is formed completely of a hard material and includes a main bit (2) and at least one auxiliary bit (3a, 3b). The at least one auxiliary bit (3a, 3b) is provided exclusively in a radially outer region of the drilling head and has an arcuate cutting edge (4a, 4b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.