E21D 23/14
Effecting automatic sequential movement of supports
Official title: Effecting automatic sequential movement of supports, e.g. one behind the other {(advancing of mining machines toward the working face E21C29/02; advancing of conveyors toward the working face E21D23/085)}
E21D23/14 (Effecting automatic sequential movement of supports) appears on 59 US grants and 23 published applications in this corpus.
Search patents in E21D- Granted patents
- 59
- Published applications
- 23
- Assignees
- 39
- Inventors
- 111
- Latest grant
- 24 Mar 2026
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| Year | Granted patents | Published applications |
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| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
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| 2003 | 4 | 2 |
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| 2006 | 1 | 4 |
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| 2008 | 3 | 1 |
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| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
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| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 1 |
| 2021 | 2 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Detection device and method for working surface, terminal, and storage medium24 Mar 2026US 12,584,410 B2Taiyuan University of Technology
- Method and device for monitoring operation of a mining machine unit5 Sep 2023US 11,746,655 B2Caterpillar Inc.
- High stress impact detection for a longwall shearer23 Nov 2021US 11,180,992 B2Joy Global Underground Mining LLC
- Automated support of a gate entry for underground full extraction mining12 Jan 2021US 10,890,068 B2
- System and method for remotely locating communication error support for hydraulic supports10 Nov 2020US 10,830,044 B1China University of Mining and Technology
- Underground mining system and method30 Jul 2026US 2026/0218612 A1
- 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
- Detection device and method for working surface, terminal, and storage medium11 Apr 2024US 2024/0117740 A1Taiyuan University of Technology
- Method and device for monitoring operation of a mining machine unit5 May 2022US 2022/0136390 A1Caterpillar SARL
- High stress impact detection for a longwall shearer19 Aug 2021US 2021/0254462 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Long range multiple point wireless control and monitoring system121US 4,968,978 AStolar, Inc. · 1990
- Long range multiple point wireless control and monitoring system86US 5,087,099 AStolar, Inc. · 1992
- Method of transmitting data from a drillhead57US 5,268,683 AStolar, Inc. · 1993
- Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam29US 4,887,935 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1989
- Method and a device for detecting the presence of personnel in underground mining28US 6,512,312 B1DBT Automation GmbH · 2003