E21D 9/0642
The shield having means for additional processing at the front end
Official title: {the shield having means for additional processing at the front end}
E21D9/0642 (The shield having means for additional processing at the front end) appears on 41 US grants and 17 published applications in this corpus.
Search patents in E21D- Granted patents
- 41
- Published applications
- 17
- Assignees
- 36
- Inventors
- 97
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 2 |
| 2022 | 0 | 0 |
| 2023 | 1 | 6 |
| 2024 | 3 | 0 |
| 2025 | 3 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ground drilling device11 Nov 2025US 12,467,320 B2
- Methods for real-time deviation monitoring of miniature pipe roofing jacking pipe of spiral soil-discharging19 Aug 2025US 12,392,609 B2Cccc First Harbor Engineering Co., Ltd.
- Device and method for driving a tunnel15 Jul 2025US 12,359,566 B2Herrenknecht AG
- Tunnel boring machine having a device for detecting a content of critical gas3 Dec 2024US 12,158,071 B2Herrenknecht AG
- Hard rock tunnel boring machine combining microwave heating with high pressure water cutting for assisting in rock breaking9 Jul 2024US 12,031,437 B2China Railway Tunnel Group Co., Ltd.
- Shield cutterhead for cutting diaphragm wall with steel i-beam29 Jan 2026US 2026/0028910 A1China Railway First Group Urban Track Transport Engineering Co., Ltd.
- Methods for real-time deviation monitoring of miniature pipe roofing jacking pipe of spiral soil-discharging17 Jul 2025US 2025/0231026 A1Cccc First Harbor Engineering Co., Ltd.
- Mechanical tunneling apparatus and process for tunnel in quicksand stratum28 Dec 2023US 2023/0417139 A1Shandong University
- Ground drilling device31 Aug 2023US 2023/0272674 A1
- Device and method for driviing a tunnel17 Aug 2023US 2023/0258084 A1Herrenknecht AG
Most cited
By later US patents
- Tunnel boring machine with crusher29US 6,017,095 A2000
- Shield tunneling machine25US 4,655,493 AKabushiki Kaisha Iseki Kaihatsu Koki · 1987
- Shield tunnel boring machine23US 4,607,889 ADaiho Construction Co., Ltd. · 1986
- Shield tunneling method and machine therefor21US 4,406,498 AKabushiki Kaisha Iseki Kaihatsu Koki · 1983
- Tunneling machine with center cutter and debris removing means20US 5,437,500 AHerrenknecht AG · 1995