Double ranging drum cutter having load controller
US4741577A · kind A · utility
25Cited by
4References
1Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 24, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Sep 24, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21C35/302
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
According to the applicant's invention a load detector is used, in which a load sensor and a vibration sensor are combined using an AND gate. A load signal from the load detector is used for the feedback control of the cutter drum height and double ranging drum cutter running speed, so that a person who is not skilled can operate the double ranging drum cutter while preventing overload acting on the cutter drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.