E21D 9/06
Making by using a driving shield , i.e. advanced by pushing means
Official title: Making by using a driving shield {, i.e. advanced by pushing means bearing against the already placed lining (pushing prefabricated elements through the ground from an access pit E21D9/005)}
E21D9/06 (Making by using a driving shield , i.e. advanced by pushing means) appears on 290 US grants and 118 published applications in this corpus.
Search patents in E21D- Granted patents
- 290
- Published applications
- 118
- Assignees
- 166
- Inventors
- 667
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 13 | 0 |
| 1978 | 14 | 0 |
| 1979 | 13 | 0 |
| 1980 | 7 | 0 |
| 1981 | 10 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 4 |
| 2003 | 3 | 3 |
| 2004 | 1 | 3 |
| 2005 | 3 | 3 |
| 2006 | 3 | 0 |
| 2007 | 0 | 5 |
| 2008 | 2 | 0 |
| 2009 | 1 | 0 |
| 2010 | 2 | 8 |
| 2011 | 0 | 0 |
| 2012 | 3 | 2 |
| 2013 | 4 | 3 |
| 2014 | 3 | 7 |
| 2015 | 8 | 5 |
| 2016 | 5 | 2 |
| 2017 | 2 | 3 |
| 2018 | 3 | 2 |
| 2019 | 2 | 9 |
| 2020 | 8 | 6 |
| 2021 | 7 | 11 |
| 2022 | 8 | 10 |
| 2023 | 11 | 14 |
| 2024 | 11 | 8 |
| 2025 | 10 | 3 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21D 9/08With additional boring or cutting means other than the conventional cutting edge136
- E21D 9/093Control of the driving shield42
- E21D 9/0642The shield having means for additional processing at the front end41
- E21D 9/0692Cutter drive shields38
- E21D 9/0607The shield being provided with devices for lining the tunnel23
- E21D 9/0621Shield advancing devices23
- E21D 9/0635Tail sealing means20
Recent patents
- High power laser tunneling mining and construction equipment and methods of use25 Aug 2026US 12,715,063 B2Foro Energy, Inc.
- Tunnel excavation apparatus to which spectroscopic analysis method is applied16 Jun 2026US 12,655,760 B2Korea Radioactive Waste Agency
- Movable visual inspection device for shield machines28 Apr 2026US 12,613,199 B2China Railway Sunward Engineering Equipment Co., Ltd.
- Cutting wheel for a cutting boring machine7 Apr 2026US 12,595,734 B2Herrenknecht AG
- Energy device for shield machines20 Jan 2026US 12,529,315 B2China Railway Sunward Engineering Equipment Co., Ltd.
- 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
- A pipe jacking machine7 May 2026US 2026/0126131 A1Hk Ck Development Limited
- Tunnel construction method and machine9 Apr 2026US 2026/0098474 A1MACCAFERRI TUNNELING S.r.l.
- Tunnel Lining Method and Apparatus26 Feb 2026US 2026/0055705 A1Colin Eddie Consulting Limited
Most cited
By later US patents
- Tunnel boring machine and method35US 5,890,771 A1999
- Shielded cutterhead with small rolling disc cutters35US 5,961,185 AExcavation Engineering Associates, Inc. · 1999
- Method and system for mining hydrocarbon-containing materials34US 6,929,330 B2Oil Sands Underground Mining, Inc. · 2005
- Shield tunneling system capable of electromagnetically detecting and displaying conditions of ground therearound31US 4,774,470 AMitsui Engineering & Shipbuilding Co., Ltd. · 1988
- Tail packing for a slurry pressurized shield30US 4,209,268 AOhbayashi-Gumi, Ltd. · 1980