E21B 4/145
Of the self propelled-type
Official title: {of the self propelled-type, e.g. with a reverse mode to retract the device from the hole}
E21B4/145 (Of the self propelled-type) appears on 167 US grants and 39 published applications in this corpus.
Search patents in E21B- Granted patents
- 167
- Published applications
- 39
- Assignees
- 49
- Inventors
- 164
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 14 | 0 |
| 1990 | 9 | 0 |
| 1991 | 8 | 0 |
| 1992 | 13 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 0 |
| 2003 | 3 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 2 |
| 2006 | 3 | 3 |
| 2007 | 2 | 1 |
| 2008 | 0 | 3 |
| 2009 | 1 | 3 |
| 2010 | 1 | 1 |
| 2011 | 3 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 3 | 1 |
| 2016 | 2 | 2 |
| 2017 | 0 | 2 |
| 2018 | 1 | 2 |
| 2019 | 2 | 2 |
| 2020 | 2 | 3 |
| 2021 | 2 | 3 |
| 2022 | 3 | 1 |
| 2023 | 3 | 2 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Device for dampening the force acting on an electronic component, and a drill rod section of a ground drilling device having such a device25 Mar 2025US 12,258,853 B2TRACTO-TECHNIK GmbH & Co. KG
- Diaphragm wall down-the-hole hammer trenching machine and use method thereof14 May 2024US 11,982,157 B2
- Drill bit of a ground drilling device with an enlargement of a receptacle for fastening an attachment thereto and method for producing same30 Apr 2024US 11,970,909 B2TRACTO-TECHNIK GmbH & Co. KG
- Drilling head for a percussive displacement ground drilling device and use of a drilling head for a percussive displacement ground drilling device26 Sep 2023US 11,767,716 B2TRACTO-TECHNIK GmbH & Co. KG
- Percussion boring device and method for reversing a percussion boring device25 Apr 2023US 11,634,949 B2TRACTO-TECHNIK GmbH & Co. KG
- Earth Drilling Device16 Oct 2025US 2025/0320780 A1TRACTO-TECHNIK GmbH & Co. KG
- Diaphragm wall down-the-hole hammer trenching machine and use method thereof12 Oct 2023US 2023/0323735 A1
- Drill head of a ground drilling device, method for producing a drill head of a ground drilling device, and use of a drill head of a ground drilling device5 Jan 2023US 2023/0003087 A1TRACTO-TECHNIK GmbH & Co. KG
- Drilling head for a percussive displacement ground drilling device and use of a drilling head for a percussive displacement ground drilling device24 Feb 2022US 2022/0056765 A1TRACTO-TECHNIK GmbH & Co. KG
- Ground drilling device, method for the production and use thereof27 May 2021US 2021/0156199 A1TRACTO-TECHNIK GmbH & Co. KG
Most cited
By later US patents
- Control for guiding a boring tool89US 4,646,277 AGas Research Institute · 1987
- Self-propelled ram boring machine82US 5,010,965 ATracto-Technik Paul Schmidt Maschinenfabrik KG · 1991
- Guided earth boring tool70US 4,694,913 AGas Research Institute · 1987
- Earth boring apparatus and method with control valve67US 4,834,193 AGas Research Institute · 1989
- Differential pneumopercussive reversible self-propelled soil penetrating machine43US 5,311,950 A1994