Device for preventing ingress of dust through the annular gap between the cutting arm and the cutting head of a cutting machine
US4389075A · kind A · utility
4Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1980 |
| Grant date | Jun 21, 1983 |
| Priority date | — |
| Expiry date | Dec 5, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/1026
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
For the purpose of sealing the annular gap between a cutting arm (2) and cutting heads (6) rotatably supported on this cutting arm (2), a main sealing (12) and an additional sealing element (13) is provided. The area of the annular gap (17) is rinsed by water flowing from the gap in outward direction, the water supply conduit (18) opening into the outward area, being designed as a labyrinth, of the gap (7) via a nozzle (17) (FIG. 3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.