E21D 5/00
Lining shafts
Official title: Lining shafts; Linings therefor (E21D11/00 takes precedence {; sinking with simultaneous lowering of the lining E21D1/08})
E21D5/00 (Lining shafts) appears on 63 US grants and 40 published applications in this corpus.
Search patents in E21D- Granted patents
- 63
- Published applications
- 40
- Assignees
- 54
- Inventors
- 176
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 4 |
| 2013 | 0 | 2 |
| 2014 | 3 | 6 |
| 2015 | 3 | 1 |
| 2016 | 1 | 6 |
| 2017 | 3 | 3 |
| 2018 | 4 | 2 |
| 2019 | 3 | 0 |
| 2020 | 1 | 3 |
| 2021 | 2 | 1 |
| 2022 | 2 | 2 |
| 2023 | 0 | 0 |
| 2024 | 2 | 5 |
| 2025 | 3 | 1 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21D 5/12Accessories for making shaft linings17
- E21D 5/04Lining shafts: with brick, concrete, stone, or similar building materials16
- E21D 5/06Lining shafts: with iron or steel10
- E21D 5/01Lining shafts: using prefabricated lining lowered into a hole filled with liquid7
- E21D 5/11Lining shafts: with combinations of different materials7
- E21D 5/012Use of fluid-tight or anti-friction material on outside of, or between, lining2
- E21D 5/016Bearer curbs0
- E21D 5/02Lining shafts: with wood0
Recent patents
- Slipform blade and method for applying pre-compression strain to cast-in-place concrete on well walls4 Aug 2026US 12,698,709 B2
- Shaft excavator23 Jun 2026US 12,662,940 B2REDPATH DEILMANN GmbH
- Method for calculating diameter of annular non-full formwork support for circular shaft5 May 2026US 12,618,668 B2China Railway No. 8 Engineering Group Co., Ltd.
- Excavation and shoring equipment2 Dec 2025US 12,486,767 B2
- Full-face shaft boring machine, boring system, and boring method9 Sep 2025US 12,410,660 B1China University of Mining and Technology, Beijing
- Apparatus, system and method for use with utility tunnels6 Aug 2026US 2026/0226830 A1British Telecommunications Public Ltd.Co.
- Slipform blade and method for applying pre-compression strain to cast-in-place concrete on well walls12 Feb 2026US 2026/0043330 A1China University of Mining and Technology
- Method for calculating diameter of annular non-full formwork support for circular shaft15 May 2025US 2025/0155240 A1China Railway No. 8 Engineering Group Co., Ltd.
- Shaft Excavator7 Nov 2024US 2024/0368989 A1REDPATH DEILMANN GmbH
- Excavation boring and shoring tool4 Jul 2024US 2024/0218741 A1
Most cited
By later US patents
- Method of lining a pipe194US 4,009,063 AInsituform (Pipes & Structures) Ltd. · 1977
- Composite underground fluid conduit of concrete and steel sections19US 4,241,762 AGutehoffnungshutte Sterkrade Aktiengesellschaft · 1980
- Slipform apparatus for vertical bores17US 4,205,949 A1980
- Method and system for lining shafts16US 4,473,322 A1984
- Cofferdam for 4', 8' and 12' diameter tanks16US 5,595,459 A1997