E21C 29/20
With safety devices operating in the event of breakage of the cable
Official title: with safety devices operating in the event of breakage of the cable or chain
E21C29/20 (With safety devices operating in the event of breakage of the cable) appears on 4 US grants and 0 published applications in this corpus.
Search patents in E21C- Granted patents
- 4
- Published applications
- 0
- Assignees
- 4
- Inventors
- 10
- Latest grant
- 19 Aug 1997
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Toggle securing device for toggle joints in chain conveyors and the like19 Aug 1997US 5,658,085 ADBT Deutsche Bergbau-Technik GmbH
- Long-wall mining machine with a working chain29 Apr 1997US 5,624,162 ABochumer Eisenhutte Heintzmann GmbH & Co. KG
- Mechanisms for drawing a chain into or through a channel of a chain guide1 Dec 1992US 5,167,437 AWestfalia Becorit Industrietechnik GmbH
- Gearing units for use with mining equipment28 Jul 1987US 4,682,678 AGewerkschaft Eisenhutte Westfalia
No published applications in this class yet.
Most cited
By later US patents
- Long-wall mining machine with a working chain21US 5,624,162 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1997
- Gearing units for use with mining equipment6US 4,682,678 AGewerkschaft Eisenhutte Westfalia · 1987
- Toggle securing device for toggle joints in chain conveyors and the like6US 5,658,085 ADBT Deutsche Bergbau-Technik GmbH · 1997
- Mechanisms for drawing a chain into or through a channel of a chain guide5US 5,167,437 AWestfalia Becorit Industrietechnik GmbH · 1992