E21C 31/00
Driving means incorporated in machines for slitting or completely freeing the mineral
Official title: Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
E21C31/00 (Driving means incorporated in machines for slitting or completely freeing the mineral) appears on 167 US grants and 111 published applications in this corpus.
Search patents in E21C- Granted patents
- 167
- Published applications
- 111
- Assignees
- 76
- Inventors
- 274
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 9 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 5 |
| 2012 | 2 | 2 |
| 2013 | 3 | 8 |
| 2014 | 7 | 7 |
| 2015 | 9 | 7 |
| 2016 | 5 | 7 |
| 2017 | 4 | 12 |
| 2018 | 7 | 15 |
| 2019 | 11 | 4 |
| 2020 | 13 | 13 |
| 2021 | 9 | 9 |
| 2022 | 12 | 8 |
| 2023 | 5 | 1 |
| 2024 | 2 | 4 |
| 2025 | 4 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- E21C 31/02Driving means incorporated in machines for slitting or completely freeing the mineral97
- E21C 31/12Component parts35
- E21C 31/10Driving means incorporated in machines for slitting or completely freeing the mineral27
- E21C 31/08Driving means incorporated in machines for slitting or completely freeing the mineral20
Recent patents
- Cutter head for mining machine12 Aug 2025US 12,385,395 B2Joy Global Underground Mining LLC
- Electric terminal assembly of a drive unit for use in a mining machine10 Jun 2025US 12,328,054 B2Caterpillar Global Mining Europe GmbH
- Mine material processing apparatus including gas spring wheel assemblies and related methods3 Jun 2025US 12,319,090 B2Gacw Incorporated
- Liquid-tight drive connection for engine and transmission coupling28 Jan 2025US 12,209,650 B2Caterpillar Inc.
- Roadway/tunnel excavation robot and automatic cutting control method17 Sep 2024US 12,091,977 B2China University of Mining and Technology
- Cutting assembly for longwall mining system3 Oct 2024US 2024/0328315 A1Joy Global Underground Mining LLC
- Roadway/tunnel excavation robot and automatic cutting control method2 May 2024US 2024/0141784 A1China University of Mining and Technology
- Cutter head for mining machine18 Apr 2024US 2024/0125232 A1Joy Global Underground Mining LLC
- Mining machine and method for controlling movement of a movable element of a mining machine4 Apr 2024US 2024/0110477 A1Sandvik Mining and Construction Oy
- Electric terminal assembly of a drive unit for use in a mining machine11 May 2023US 2023/0142261 A1Caterpillar Global Mining Europe GmbH
Most cited
By later US patents
- Oscillating disk thin seam mining machine with steering22US 4,045,088 A1977
- Cutting machine22US 4,589,701 AGewerkschaft Eisenhutte Westfalia · 1986
- Cutter head for mining machine19US 9,470,087 B2Joy MM Delaware, Inc. · 2016
- Mining boom linkage for separate sump and swing cutting18US 3,966,258 AJoy Manufacturing Company · 1976
- Cutting head with self-contained power source18US 4,172,616 ACoaltex, Inc. · 1979