Rotary rock drilling chuck
US4593769A · kind A · utility
0Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Aug 16, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/1283
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A chuck for a drilling machine is fitted to a retractable spindle 21. Plungers 25 carried by a yoke 26 move when the yoke 26 abuts the front end 20 of the machine. This charges an accumulator carried inside the chuck body. Opening a valve 39 causes the chuck jaws to clamp while closing the valve 39 and opening a valve 55 causes the chuck jaws to relax.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.