Rock drill
US4924953A · kind A · utility
6Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Apr 21, 2009 |
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/or percussive stress, in particular for use in percussion or hammer drilling machines, is proposed, which by its geometrical design makes improved efficiency and simplified production possible. For this purpose, the feed spiral 5 is designed alternately with horizontal feed sections 8,8' with a 0.degree. pitch, and adjoining lead sections 9,9', the respective feed sections assuming an angle of rotation of 90.degree. on the drilling tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.