E21C 29/06
Anchored at one or both ends to the mine working face
Official title: anchored at one or both ends to the mine working face {(propulsion using fixed racks along which the machine is running E21C29/02)}
E21C29/06 (Anchored at one or both ends to the mine working face) appears on 26 US grants and 2 published applications in this corpus.
Search patents in E21C- Granted patents
- 26
- Published applications
- 2
- Assignees
- 20
- Inventors
- 46
- Latest grant
- 27 Aug 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Scraping elements for drive units of underground mining applications27 Aug 2019US 10,392,195 B2Caterpillar Global Mining Europe GmbH
- Chain guide arrangement on a mining machine6 Jun 2006US 7,055,913 B2DBT GmbH
- Drive system having a pin drive chain for a cutting machine for underground mining3 Aug 1999US 5,931,540 ADBT Deutsche Bergbau-Technik GmbH
- Drive gear and guide arrangement for a mining machine, in particular a disk shearer11 Feb 1997US 5,601,341 ADBT Deutsche Bergbau-Technik GmbH
- Guide rail for scraper conveyor of mining machine20 Aug 1996US 5,547,262 ADBT Deutsche Bergau-Technik GmbH
Most cited
By later US patents
- Contour miner8US 4,260,195 A1981
- Scraper chain conveyor assembly7US 4,269,304 AHalbach & Braun · 1981
- Chain having longitudinal stiffness used with hauling and cutting equipment7US 4,372,619 AHalbach & Braun · 1983
- Guide for a hewing machine mounted on a conveyor7US 5,131,723 AKloeckner-Becorit GmbH · 1992
- Arrangement for guiding a cutting machine or similar mining machine at the conveyor trough of a drag-chain conveyor7US 5,161,858 AHalbach & Braun Industrieanlagen · 1992