E21B 1/26
By liquid pressure
Official title: by liquid pressure
E21B1/26 (By liquid pressure) appears on 32 US grants and 35 published applications in this corpus.
Search patents in E21B- Granted patents
- 32
- Published applications
- 35
- Assignees
- 23
- Inventors
- 70
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 3 |
| 2016 | 3 | 3 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 2 |
| 2021 | 1 | 1 |
| 2022 | 3 | 6 |
| 2023 | 4 | 3 |
| 2024 | 3 | 6 |
| 2025 | 8 | 2 |
| 2026 | 1 | 1 |
By publication year. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic impact mechanism for use in equipment for processing rock and concrete16 Jun 2026US 12,655,687 B2T-Rig Limited
- Valve-controlled high-energy hydrostatic down-the-hole impact hammer23 Dec 2025US 12,503,915 B2Southwest Petroleum University
- Arrangement and method for heating hydraulic impact device25 Nov 2025US 12,480,364 B2Sandvik Mining and Construction Oy
- Valve cylinder, impact device and method2 Sep 2025US 12,404,725 B2Sandvik Mining and Construction Oy
- Percussion device and method for controlling the same1 Jul 2025US 12,345,020 B2Sandvik Mining and Construction Oy
- Hydraulic Hammering Device7 May 2026US 2026/0125951 A1Furukawa Rock Drill Co., Ltd.
- Hydraulic impact mechanism for use in equipment for processing rock and concrete27 Mar 2025US 2025/0101807 A1T-Rig Limited
- Valve cylinder, impact device and method23 Jan 2025US 2025/0027368 A1Sandvik Mining and Construction Oy
- Hydraulically Actuated Tool21 Nov 2024US 2024/0384614 A1Odfjell Technology Invest Ltd
- Experimental apparatus for breaking rock through vibration impact24 Oct 2024US 2024/0352795 A1China University of Petroleum-Beijing
Most cited
By later US patents
- Impact device with a rotable control valve6US 7,290,622 B2Sandvik Mining and Construction Oy · 2007
- Rock breaking device, protection valve and a method of operating a rock breaking device6US 8,118,112 B2Sandvik Mining and Construction Oy · 2012
- Pulse generating device and a rock drilling rig comprising such a device3US 8,720,602 B2Atlas Copco Rock Drills AB · 2014
- Formation breaking assembly2US 7,503,628 B22009
- Shank adaptor with reinforced flushing slot1US 10,745,972 B2Sandvik Intellectual Property AB · 2020