Core puller for pulling test cores
US5328221A · kind A · utility
3Cited by
21References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method for removing cores from a material to be tested includes a first split shell having a first split portion, a tightening device for moving confronting ends of the first shell towards each other so that the shell grips the core to be pulled, and a handle for pulling the core. The core puller is inserted into a space left by a drill bit. The core puller is tightened around the core to be pulled, and the core is then pulled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.