E21D 9/116
By means of non-concentric rotary heads
Official title: {by means of non-concentric rotary heads (E21D9/111 takes precedence)}
E21D9/116 (By means of non-concentric rotary heads) appears on 14 US grants and 10 published applications in this corpus.
Search patents in E21D- Granted patents
- 14
- Published applications
- 10
- Assignees
- 14
- Inventors
- 43
- Latest grant
- 19 Jul 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 2 | 3 |
| 2022 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Automatic coal mining machine and fluidized coal mining method19 Jul 2022US 11,391,151 B2China University of Mining and Technology, Beijing
- Mining machine applicable to fluidized mining of ore bodies and mining method1 Mar 2022US 11,261,732 B2China University of Mining and Technology, Beijing
- Hard rock roadway and tunnel boring machine with actively rotating hobs14 Dec 2021US 11,199,092 B2China University of Mining and Technology
- Cutting apparatus17 Aug 2021US 11,092,009 B2Sandvik Intellectual Property AB
- Apparatus and method for driving a cavity in mining16 Jun 2020US 10,683,750 B2Herrenknecht AG
- Automatic coal mining machine and fluidized coal mining method4 Nov 2021US 2021/0340870 A1China University of Mining and Technology, Beijing
- Mining machine applicable to fluidized mining of ore bodies and mining method14 Oct 2021US 2021/0317739 A1China University of Mining and Technology, Beijing
- Hard rock roadway and tunnel boring machine with actively rotating hobs29 Jul 2021US 2021/0231013 A1China University of Mining and Technology
- Cutting apparatus7 May 2020US 2020/0141236 A1Sandvik Intellectual Property AB
- Tunnel boring machine29 Aug 2019US 2019/0264563 A1Xcmg-Kaigong Heavy Industry Nanjing Co., Ltd
Most cited
By later US patents
- Underground excavating machine having independently movable half-frames27US 3,995,907 ALinden-Alimak AB · 1976
- Machine for mechanically advancing clean cut underground mining galleries of various profiles8US 4,185,873 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1980
- Tunnelling machine5US 4,232,905 AAtlas Copco Aktiebolag · 1980
- Extendable cutter drum for a boring machine5US 7,475,947 B2Sandvik Intellectual Property AB · 2009
- Rock excavating arched tunnel forming machine4US 3,979,151 ACoal Industry (Patents) Limited · 1976