Rotary cutter for tunnel boring machine
US7997659B2 · kind B2 · utility
10Cited by
39References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2008 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Aug 28, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotary cutter for a tunnel boring machine or similar machine has a cutter ring mounted to a hub. The hub is mounted on a shaft. A sleeve bearing system is positioned between the hub and the shaft for supporting the hub on the shaft and allowing relative rotation. A duo-cone seal assembly is positioned between the hub and the shaft to seal out contaminants from the sleeve bearing system. An oil gallery with lubricating oil for lubricating the sleeve bearing system is provided in the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.