E21B 1/30
By air, steam or gas pressure
Official title: by air, steam or gas pressure
E21B1/30 (By air, steam or gas pressure) appears on 30 US grants and 19 published applications in this corpus.
Search patents in E21B- Granted patents
- 30
- Published applications
- 19
- Assignees
- 22
- Inventors
- 80
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 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 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 2 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 5 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Down-the-hole hammer with ported piston and flow control valve21 Apr 2026US 12,607,069 B2Caterpillar Inc.
- Method and apparatus for removing debris from a drill hole during drilling1 Jul 2025US 12,345,106 B2
- Down-the-hole hammer with adjustable air consumption25 Feb 2025US 12,234,706 B2Caterpillar Inc.
- Flushing and connection arrangements for percussion drill tools2 Jul 2024US 12,024,950 B2Mincon International Limited
- Method and apparatus for removing debris from a drill hole during drilling28 Feb 2023US 11,591,867 B2
- Earth Drilling Device16 Oct 2025US 2025/0320780 A1TRACTO-TECHNIK GmbH & Co. KG
- Down-the-hole hammer with ported piston and flow control valve21 Nov 2024US 2024/0384597 A1Caterpillar Inc.
- Down-the-hole hammer with adjustable air consumption21 Nov 2024US 2024/0384599 A1Caterpillar Inc.
- Percussion drilling apparatus and method (with damper)18 Apr 2024US 2024/0125228 A1Rig Technologies International Pty Ltd
- Method and apparatus for removing debris from a drill hole during drilling22 Feb 2024US 2024/0060371 A1
Most cited
By later US patents
- Percussive tool12US 4,690,225 AInstitut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk SSSR · 1987
- Damping device for a percussion rock drilling machine12US 4,871,035 AAtlas Copco Aktiebolag · 1989
- Hammer drill10US 4,690,226 AMetabowerke GmbH · 1987
- Pneumatic motor for rock drills and the like8US 4,429,752 AJoy Manufacturing Company · 1984
- Pneumatic rock drill with peripheral piston clearance space7US 3,991,835 AJoy Manufacturing Company · 1976