Hollow pick shank
US7992945B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2007 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Aug 12, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/188
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect of the invention, a degradation pick comprises a bolster disposed intermediate a shank and an impact tip. The shank comprises an outer diameter and first and second ends. The shank is coupled to the bolster through the first end and the second end is adapted for insertion into a central bore of a holder attached to a driving mechanism. The shank comprises a hollow portion disposed within the outer diameter and between the first and second ends. The hollow portion may comprise an opening that is disposed in the second end. In some embodiments the hollow portion may comprise a length that is at least as great as the outer diameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.