Clamping device, especially for rock or concrete drills
US4055353A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1976 |
| Grant date | Oct 25, 1977 |
| Priority date | — |
| Expiry date | Aug 16, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present clamping device is intended for releasably connecting a driving member, such as a shaft driving a drill bit, in a force transmitting manner to a tubular driven member, such as the boring pipe or tube. A clamping body fits into the free end of the tubular member in a centering manner. The drill shaft may be secured to the centering, clamping body, for example, by a threading. The centering body has a ring groove which receives a clamping ring having a wedging slot extending axially through the clamping ring. A wedge may be forced into the wedging slot by means of a screw, whereby the clamping ring is expanded radially outwardly to connect the centering clamping body to the tubular member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.