E21C 35/04
Safety devices
Official title: Safety devices (operating in the event of breakage of a haulage cable or chain E21C29/20)
E21C35/04 (Safety devices) appears on 80 US grants and 38 published applications in this corpus.
Search patents in E21C- Granted patents
- 80
- Published applications
- 38
- Assignees
- 48
- Inventors
- 156
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 2 |
| 2014 | 3 | 5 |
| 2015 | 2 | 3 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 3 | 2 |
| 2019 | 0 | 1 |
| 2020 | 0 | 4 |
| 2021 | 3 | 3 |
| 2022 | 3 | 4 |
| 2023 | 1 | 0 |
| 2024 | 3 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sensor system of underground mining vehicles and underground mining vehicle comprising sensor system5 May 2026US 12,618,327 B2Sandvik Mining and Construction Oy
- Object proximity detection and feedback system for a mining machine30 Sep 2025US 12,428,818 B2Joy Global Surface Mining Inc
- Methane watchdog system, a cost effective approach to longwall methane monitoring and control9 Jul 2024US 12,031,888 B2West Virginia University
- System for remotely operating a mine machine and related methods9 Apr 2024US 11,952,897 B1J.H. Fletcher & Co.
- Cable handling system for longwall mining machines12 Mar 2024US 11,927,097 B2Caterpillar Inc.
- Sensor system and a method for a mining vehicle9 Apr 2026US 2026/0098473 A1Sandvik Mining and Construction Oy
- Sensor system of underground mining vehicles and underground mining vehicle comprising sensor system24 Apr 2025US 2025/0129719 A1Sandvik Mining and Construction Oy
- Cable handling system for longwall mining machines22 Dec 2022US 2022/0403738 A1Caterpillar Inc.
- Ceramic wear plate26 May 2022US 2022/0162939 A1Sandvik SRP AB
- Object proximity detection and feedback system for a mining machine14 Apr 2022US 2022/0112690 A1Joy Global Surface Mining Inc
Most cited
By later US patents
- Electronic method and apparatus for detecting and reporting dislocation of heavy mining equipment28US 6,870,485 B22005
- Automated quarry operation with communication interface24US 6,243,625 B1N E D Corp. · 2001
- Cutting machine22US 4,108,494 AVereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellschaft · 1978
- Drive systems for mining apparatus20US 4,078,452 AGewerkschaft Eisenhutte Westfalia · 1978
- Method and apparatus for securing mining machines employed on inclined or steep seams17US 4,097,091 AGebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H. · 1978