E21D 1/06
With shaft-boring cutters
Official title: with shaft-boring cutters (drilling machines E21B, E21C)
E21D1/06 (With shaft-boring cutters) appears on 38 US grants and 19 published applications in this corpus.
Search patents in E21D- Granted patents
- 38
- Published applications
- 19
- Assignees
- 31
- Inventors
- 96
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 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 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 1 |
| 2014 | 2 | 1 |
| 2015 | 2 | 3 |
| 2016 | 0 | 3 |
| 2017 | 0 | 0 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 2 |
| 2024 | 3 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for sinking a vertical borehole17 Feb 2026US 12,553,286 B2Herrenknecht AG
- Drill head for creating a borehole in the ground4 Nov 2025US 12,460,487 B2Herrenknecht AG
- Drill head and method for producing a vertical borehole in the ground9 Jul 2024US 12,031,385 B2Herrenknecht AG
- Cutter head arrangement9 Jul 2024US 12,031,438 B2Master Sinkers (Pty) Ltd.
- Full-face shaft tunnel boring machine system6 Feb 2024US 11,891,865 B1Ansteel Group Mining Corporation Limited
- Device for sinking a vertical borehole19 Jun 2025US 2025/0198284 A1Herrenknecht AG
- Drill head for creating a borehole in the ground27 Jun 2024US 2024/0209699 A1Herrenknecht AG
- Full-face shaft tunnel boring machine system29 Feb 2024US 2024/0068308 A1Ansteel Group Mining Corportion Limited
- Drilling apparatus for creating a borehole19 Oct 2023US 2023/0332367 A1Herrenknecht AG
- Drill head and method for producing a vertical borehole in the ground11 May 2023US 2023/0147209 A1Herrenknecht AG
Most cited
By later US patents
- Cutter head for pit-boring machine116US 4,448,269 AHitachi Construction Machinery Co., Ltd. · 1984
- Crane-mounted drill and method for in-situ treatment of contaminated soil97US 5,135,058 AMillgard Environmental Corporation · 1992
- Packer weighted and pressure differential method and apparatus for Big Hole drilling61US 4,534,426 AUnique Oil Tools, Inc. · 1985
- Shaft boring machine and method25US 4,646,853 AThe Robbins Company · 1987
- Shaft boring machine21US 4,494,617 AHarrison Western Corporation · 1985