Washer for a degradation assembly
US7413256B2 · kind B2 · utility
56Cited by
117References
18Claims
0Family size
Inventors
Key dates
| Filing date | Aug 11, 2006 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Aug 11, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/1831
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one aspect of the invention, a degradation assembly has an attack tool with a body and a shank, the body having a wear-resistant tip. The shank is disposed within a bore of a holder secured to a driving mechanism. A washer is positioned in-between the attack tool and the holder and fitted around the shank of the attack tool, wherein an outer edge of the washer has a hardness greater than 58 HRc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.