E21D 23/18
Of advancing mechanisms
Official title: of advancing mechanisms
E21D23/18 (Of advancing mechanisms) appears on 19 US grants and 7 published applications in this corpus.
Search patents in E21D- Granted patents
- 19
- Published applications
- 7
- Assignees
- 10
- Inventors
- 36
- Latest grant
- 12 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 3 |
| 2024 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Mining shield base lift methods12 Nov 2024US 12,138,721 B2
- Mining shield base lift wear pad1 Oct 2024US 12,103,124 B2
- Mining shield base lift apparatuses and methods3 Oct 2023US 11,772,209 B1Swanson Industries, Inc.
- Stepwise repeated destabilization and stabilization of highly collapsible soil mass by ‘soil nailing technique’ used for construction of railway/road underpass7 Jun 2016US 9,359,725 B2Council of Scientific and Industrial Research
- Coal caving cycle30 Jun 2015US 9,068,452 B2Yancoal Technology Development PTY Ltd
- Digital speed regulating valve for aligning hydraulic supports in fully mechanized mining face and control method thereof5 Dec 2024US 2024/0401480 A1Taiyuan University of Technology
- Mining shield base lift methods21 Dec 2023US 2023/0405740 A1Swanson Industries, Inc.
- Mining shield base lift wear pad21 Dec 2023US 2023/0405741 A1Swanson Industries, Inc.
- Mining shield base lift apparatuses and methods26 Oct 2023US 2023/0339051 A1Swanson Industries, Inc.
- Stepwise repeated destabilization and stabilization of highly collapsible soil mass by 'soil nailing technique' used for construction of railway/road underpass16 Jul 2015US 2015/0197895 A1Council of Scientific and Industrial Research
Most cited
By later US patents
- Mine-roof support control mechanism11US 4,465,408 AHermann Hemscheidt Maschinenfabrik GmbH & Co. · 1984
- Control systems for mineral mining installations7US 4,451,181 AGewerkschaft Eisenhutte Westfalia · 1984
- Longwall mining apparatus6US 4,109,472 ADowty Mining Equipment Limited · 1978
- Hydraulic control arrangement4US 4,613,257 AGewerkschaft Eisenhutte Westfalia · 1986
- Electrohydraulic coal-mining system4US 4,900,091 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1990