E21D 9/005
Tunnels or galleries, with or without linings: by forcing prefabricated elements through
Official title: {by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit (driving shields E21D9/06)}
E21D9/005 (Tunnels or galleries, with or without linings: by forcing prefabricated elements through) appears on 65 US grants and 24 published applications in this corpus.
Search patents in E21D- Granted patents
- 65
- Published applications
- 24
- Assignees
- 44
- Inventors
- 107
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 3 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 3 | 2 |
| 2013 | 4 | 1 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 2 | 2 |
| 2020 | 2 | 2 |
| 2021 | 2 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system of constructing an underground tunnel5 Aug 2025US 12,378,884 B2hyperTunnel IP Limited
- Method and system of constructing an underground tunnel28 Feb 2023US 11,591,908 B2hyperTunnel IP Limited
- Systems and methods for underground pipe installation and soil clearing29 Mar 2022US 11,287,060 B2Zilper Trenchless, Inc.
- Tunneling device for pipe jacking and its construction method8 Feb 2022US 11,242,748 B2
- Rectangular working well with preset pipe jacking hole and sliding back wall in water-rich stratum and construction method thereof12 Oct 2021US 11,143,027 B2Infrastructure Renewal Institute of Southern China
- Tunnel lining element28 May 2026US 2026/0146534 A1Herrenknecht AG
- A pipe jacking machine7 May 2026US 2026/0126131 A1Hk Ck Development Limited
- Systems, Methods and Apparatus of Tunnel Construction13 Nov 2025US 2025/0347225 A1Sheet Tunnel LLC
- Method and system of constructing an underground tunnel8 Jun 2023US 2023/0175395 A1hyperTunnel IP Limited
- Method and system of constructing an underground tunnel6 Jan 2022US 2022/0003115 A1hyperTunnel IP Limited
Most cited
By later US patents
- Method of excavating tunnels22US 4,116,011 A1978
- Method for constructing a tunnel or underpass18US 4,009,579 A1977
- Method and apparatus for controlled pumping of bentonite around a pipe jacked tunnel16US 5,632,575 A1997
- Method of advancing a plurality of longitudinally arranged movable constructional units forwardly successively in a self-running manner and apparatus for performing same14US 4,095,435 A1978
- Method and apparatus for lateral excavation14US 4,146,347 A1979