E21C 35/043
Protection against overload during transfer of machines for slitting or completely freeing
Official title: {Protection against overload during transfer of machines for slitting or completely freeing the mineral from the seam}
E21C35/043 (Protection against overload during transfer of machines for slitting or completely freeing) appears on 9 US grants and 0 published applications in this corpus.
Search patents in E21C- Granted patents
- 9
- Published applications
- 0
- Assignees
- 8
- Inventors
- 17
- Latest grant
- 10 Jul 2001
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Device for protecting selective cutting machines against overload10 Jul 2001US 6,257,671 B1Tamrock Voest-Alpine Bergtechnik Gesellschaft m.b.H.
- Overload protection system for planetary gear drive30 Sep 1986US 4,614,134 AGewerkschaft Eisenhutte Westfalia
- Gearing units for use with mining apparatus22 Jul 1986US 4,601,218 AGewerkschaft Eisenhutte Westfalia
- Protecting device for partial-cut cutting machines27 May 1986US 4,591,209 AVoest-Alpine Aktiengesellschaft
- Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded26 May 1981US 4,269,448 AAnderson Strathclyde PLC
No published applications in this class yet.
Most cited
By later US patents
- Drive systems for mining apparatus20US 4,078,452 AGewerkschaft Eisenhutte Westfalia · 1978
- Overload protection system for planetary gear drive14US 4,614,134 AGewerkschaft Eisenhutte Westfalia · 1986
- Flywheel for a construction machine13US 4,171,147 ACMI Corporation · 1979
- Protecting device for partial-cut cutting machines11US 4,591,209 AVoest-Alpine Aktiengesellschaft · 1986
- Gearing units for use with mining apparatus9US 4,601,218 AGewerkschaft Eisenhutte Westfalia · 1986