E21D 11/22
Clamps or other yieldable means for interconnecting adjacent arch members either rigidly
Official title: Clamps or other yieldable means for interconnecting adjacent arch members either rigidly, or allowing arch member parts to slide when subjected to excessive pressure
E21D11/22 (Clamps or other yieldable means for interconnecting adjacent arch members either rigidly) appears on 16 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 16
- Published applications
- 6
- Assignees
- 15
- Inventors
- 46
- Latest grant
- 3 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Telescopic device and telescopic annular tunnel steel arch3 Sep 2024US 12,078,065 B2Zhejiang University City College
- Adjustable lattice girder8 Feb 2022US 11,242,750 B2FCI Holdings Delaware, Inc.
- Reinforcement system for the concrete lining of the inner shell of a tunnel construction23 Nov 2021US 11,180,994 B2Bag Bauartikel GmbH
- Clip and method for joining steel ribs used as tunnel liner supports24 Dec 2013US 8,613,567 B2
- Arch useful for withstanding effect of rockburst occurring in underground mines/tunnels15 Aug 2000US 6,102,628 ACouncil of Scientific and Industrial Research
- Telescopic device and telescopic annular tunnel steel arch23 May 2024US 2024/0167383 A1Zhejiang University City College
- Adjustable Lattice Girder27 May 2021US 2021/0156251 A1FCI Holdings Delaware, Inc.
- Reinforcement system for the concrete lining of the inner shell of a tunnel construction10 Sep 2020US 2020/0284147 A1Bag Bauartikel GmbH
- Device for connecting the structural elements of ribs and reticular structures6 Apr 2017US 2017/0096895 A1Officine Maccaferri Italia S.R.L.
- Yieldable cambered arch support assembly8 Nov 2012US 2012/0282041 A1
Most cited
By later US patents
- Connector for bolted joints11US 4,160,609 AHollybank Engineering Company Limited · 1979
- Method and apparatus for advancing and supporting an underground mine gallery8US 4,077,670 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1978
- Yieldable joint7US 4,018,054 AArmco Steel Corporation · 1977
- System and method for supporting a mining gallery6US 4,997,317 ANeuero Stahllau GmbH & Co. · 1991
- Device for limiting stresses in particular for buried tubular structures5US 4,252,464 ADavum · 1981