Mineral mining installation with chain-tensioning system
US5171065A · kind A · utility
2Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Jul 22, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C29/145
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A plough box containing a chain wheel driving a chain to propel a chain used to move a plough is mounted for displacement alongside a machine frame at one end of a scraper-chain conveyor. To adjust the tension in the chain a motor is operated to drive a self-locking worm gearing which employs a worm wheel meshing with a rack fixed to the machine frame and extending in the direction of the chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.