E21B 6/08
Separate drives for percussion and rotation
E21B6/08 (Separate drives for percussion and rotation) appears on 17 US grants and 10 published applications in this corpus.
Search patents in E21B- Granted patents
- 17
- Published applications
- 10
- Assignees
- 17
- Inventors
- 34
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 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 | 1 | 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 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Device for generating oscillations for a construction machine and method of operation25 Mar 2025US 12,258,861 B2EURODRILL GmbH
- Multipurpose drill system16 Apr 2024US 11,959,381 B2Intelligent Drilling Applications & Technology Pty Ltd
- Down-the-hole hammer11 Aug 2015US 9,103,165 B2Mincon International Limited
- Vibration hammer3 Jul 2012US 8,210,274 B2
- Percussion device, drilling machine including such a percussion device and method for controlling such a percussion device6 Dec 2011US 8,069,928 B2Atlas Copco Rock Drills AB
- Device for generating oscillations for a construction machine and method of operation24 Oct 2024US 2024/0352797 A1EURODRILL GmbH
- Multipurpose drill system26 Nov 2020US 2020/0370374 A1Intelligent Drilling Applications & Technology Pty Ltd
- Rock drill29 May 2014US 2014/0144660 A1Rockdrill Services Australia Pty Ltd.
- Down-the-hole hammer25 Jul 2013US 2013/0186692 A1Mincon International Limited
- Air pressure reused pneumatic hammer drill16 May 2013US 2013/0118769 A1
Most cited
By later US patents
- Pneumatic impact imparting tool13US 4,867,250 ARitt Corporation · 1989
- Ultrasonic rotary-hammer drill10US 7,740,088 B1The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2010
- Rotary and percussive devices7US 4,103,746 AA. F. Hydraulics Limited · 1978
- Using a rotating inner member to drive a tool in a hollow outer member7US 7,347,283 B1The Charles Machine Works, Inc. · 2008
- Hydraulic percussive machines4US 4,126,192 AThe Steel Engineering Company Limited · 1978