E21C 29/04
Propulsion of machines for slitting or completely freeing the mineral from the
Official title: by cable or chains
E21C29/04 (Propulsion of machines for slitting or completely freeing the mineral from the) appears on 78 US grants and 25 published applications in this corpus.
Search patents in E21C- Granted patents
- 78
- Published applications
- 25
- Assignees
- 36
- Inventors
- 118
- Latest grant
- 17 Dec 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 3 |
| 2006 | 1 | 2 |
| 2007 | 3 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 2 |
| 2013 | 3 | 0 |
| 2014 | 1 | 3 |
| 2015 | 2 | 3 |
| 2016 | 2 | 1 |
| 2017 | 1 | 3 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Plow guide assembly for plow guides17 Dec 2019US 10,508,540 B2Caterpillar Global Mining Europe GmbH
- Scraping elements for drive units of underground mining applications27 Aug 2019US 10,392,195 B2Caterpillar Global Mining Europe GmbH
- Winch drum tension isolation system13 Jun 2017US 9,676,559 B2Joy MM Delaware, Inc.
- Drive connection with integrated chain tensioning apparatus for face conveyors22 Nov 2016US 9,499,347 B2Caterpillar Global Mining Europe GmbH
- Winch drum tension isolation system25 Oct 2016US 9,475,647 B2Joy MM Delaware, Inc.
- Plow guide assembly for plow guides12 Oct 2017US 2017/0292378 A1Caterpillar Global Mining Europe GmbH
- Scraping elements for drive units of underground mining applications13 Jul 2017US 2017/0197793 A1Caterpillar Global Mining Europe GmbH
- Winch drum tension isolation system9 Feb 2017US 2017/0036862 A1Joy MM Delaware, Inc.
- Drive connection with integrated chain tensioning apparatus for face conveyors24 Mar 2016US 2016/0083191 A1Caterpillar Global Mining Europe GmbH
- Excavating deposits from an underground formation layer29 Oct 2015US 2015/0308267 A1
Most cited
By later US patents
- Method and a device for tensioning endless drive belts45US 5,641,058 AWestfalia Becorit Industrietechnik GmbH · 1997
- Chain drive or return arrangement and chain assembly and sprocket employed therein22US 8,038,558 B2DBT GmbH · 2011
- Long-wall mining machine with a working chain21US 5,624,162 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1997
- Extraction device, particularly for mining, and method for controlling the extraction device21US 8,550,236 B2Caterpillar Global Mining Europe GmbH · 2013
- Drive systems for mining apparatus20US 4,078,452 AGewerkschaft Eisenhutte Westfalia · 1978