E21D 11/105
Transport or application of concrete specially adapted for the lining of tunnels
Official title: {Transport or application of concrete specially adapted for the lining of tunnels or galleries (in building E04F21/08, E04G21/02); Backfilling the space between main building element and the surrounding rock, e.g. with concrete}
E21D11/105 (Transport or application of concrete specially adapted for the lining of tunnels) appears on 62 US grants and 43 published applications in this corpus.
Search patents in E21D- Granted patents
- 62
- Published applications
- 43
- Assignees
- 64
- Inventors
- 259
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
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| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 0 |
| 2003 | 1 | 3 |
| 2004 | 4 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 4 |
| 2020 | 2 | 3 |
| 2021 | 3 | 6 |
| 2022 | 4 | 2 |
| 2023 | 2 | 4 |
| 2024 | 4 | 3 |
| 2025 | 3 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Double-liquid grouting slurry, its technology and application for super large diameter underwater shield engineering under high water pressure condition22 Sep 2026US 12,741,910 B2China Railway 14th Bureau Group Corporation Limited
- Work carriage for the lining of tunnels30 Jun 2026US 12,669,054 B2Hinfra S.R. L.
- Method of and system for in-situ creation of concrete arches8 Jul 2025US 12,352,167 B1BluCor Contracting, Inc.
- Modular tunnel formwork device11 Mar 2025US 12,247,488 B2Kern Tunneltechnik SA
- Synchronous single-liquid grouting slurry, its technology and application for large diameter shield engineering under water-rich, high-pressure and weak soil strata conditions7 Jan 2025US 12,187,646 B2China Railway 14th Bureau Group Corporation Limited
- Post-mining water-resisting layer reconstruction method and related device23 Jul 2026US 2026/0210248 A1China University of Mining and Technology, Beijing
- Pressure-controlled tunnel directional grouting-based reinforcement devices16 Apr 2026US 2026/0103981 A1China University of Mining and Technology
- Tunnel Lining Method and Apparatus26 Feb 2026US 2026/0055705 A1Colin Eddie Consulting Limited
- Monitoring system for monitoring a strength development of sprayed concrete19 Jun 2025US 2025/0198979 A1Normet Oy
- Work carriage for the lining of tunnels22 May 2025US 2025/0163806 A1Hinfra S.R. L.
Most cited
By later US patents
- Mobile train for backfilling tunnel liners with cement grout59US 5,141,363 A1992
- Method and apparatus for continuous mixing and injection of foamed cement grout47US 5,419,632 A1995
- Shotcrete spraying process24US 5,851,580 A1998
- Method and apparatus for grouting of tunnel liners19US 5,645,375 A1997
- Method for injecting lubricant or back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method and an apparatus therefor16US 5,527,135 AKabushiki Kaisha Iseki Kaihatsu Koki · 1996