E21D 9/087
With a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
Official title: with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
E21D9/087 (With a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines) appears on 33 US grants and 28 published applications in this corpus.
Search patents in E21D- Granted patents
- 33
- Published applications
- 28
- Assignees
- 32
- Inventors
- 113
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 3 |
| 2015 | 3 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 2 | 1 |
| 2019 | 0 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 4 |
| 2022 | 4 | 4 |
| 2023 | 3 | 3 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cutting wheel for a cutting boring machine7 Apr 2026US 12,595,734 B2Herrenknecht AG
- Automatic scanning system for tunnel walls constructed by open-type TBM4 Feb 2025US 12,216,469 B2Beijing Research Institute of Uranium Geology
- Excavation tool replacement device and tunnel boring machine20 Aug 2024US 12,065,932 B2Underground Infrastructure Technologies Corporation
- Mechanical tunneling apparatus and process for tunnel in quicksand stratum7 May 2024US 11,976,558 B2Shandong University
- Propulsion control device of tunnel boring machine for 3D printing a tunnel16 Jan 2024US 11,873,718 B1Zhejiang University City College
- Travel device, tunnel boring machine, trailing car, transport vehicle, tunnel boring system, and movement method23 Jul 2026US 2026/0210247 A1Komatsu Ltd.
- Steering control device of shield tbm and steering control method using the same7 May 2026US 2026/0125980 A1Korea Institute of Civil Engineering and Building Technology
- Tunnel boring machine12 Feb 2026US 2026/0043331 A1Herrenknecht AG
- Shield cutterhead for cutting diaphragm wall with steel i-beam29 Jan 2026US 2026/0028910 A1China Railway First Group Urban Track Transport Engineering Co., Ltd.
- Cutting wheel for a cutting boring machine9 May 2024US 2024/0151142 A1Herrenknecht AG
Most cited
By later US patents
- Method and apparatus for continuously boring and lining tunnels and other like structures26US 4,793,736 A1988
- Continuous tunnel boring machine and method20US 3,967,463 AThe Robbins Company · 1976
- Semi-shield method and apparatus for the same15US 5,846,027 AToyo Technos Co., Ltd. · 1998
- Method and apparatus for continuously boring and lining tunnels and other like structures9US 4,915,541 A1990
- All-conditions tunnel boring machine7US 7,832,960 B2The Robbins Company · 2010