F15B 15/17
Of differential-piston type
Official title: of differential-piston type
F15B15/17 (Of differential-piston type) appears on 26 US grants and 28 published applications in this corpus.
Search patents in F15B- Granted patents
- 26
- Published applications
- 28
- Assignees
- 31
- Inventors
- 74
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 5 |
| 2016 | 1 | 0 |
| 2017 | 2 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 3 |
| 2020 | 3 | 4 |
| 2021 | 3 | 3 |
| 2022 | 2 | 2 |
| 2023 | 3 | 1 |
| 2024 | 3 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Pre-pressurized system with reverse rotation of pump for valve actuation16 Dec 2025US 12,497,957 B2Johnson Electric Motion Technology Canada Ltd.
- Two-stage servo valve21 Oct 2025US 12,448,990 B2Goodrich Actuation Systems Limited
- Positioning valve control system17 Sep 2024US 12,092,236 B2Hamilton Sundstrand Corporation
- Working cylinder21 May 2024US 11,988,233 B2Buemach Engineering International B. V.
- Impact-resistant balanced hydro-cylinder with pressure relief and buffering protection27 Feb 2024US 11,913,479 B2Shandong University of Science and Technology
- Hydraulic System20 Nov 2025US 2025/0354570 A1Hydac Mobilhydraulik GmbH
- Two-stage servo valve27 Jun 2024US 2024/0209875 A1Goodrich Actuation Systems Limited
- Pre-pressurized system with reverse rotation of pump for valve actuation15 Feb 2024US 2024/0051367 A1Stackpole International Engineered Products, Ltd.
- Positioning valve control system12 Oct 2023US 2023/0323976 A1Hamilton Sundstrand Corporation
- Impact-resistant balanced hydro-cylinder with pressure relief and buffering protection29 Dec 2022US 2022/0412380 A1Shandong University of Science and Technology
Most cited
By later US patents
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Electrohydraulic actuator64US 6,796,120 B2Snecma Moteurs · 2004
- Pneumatic actuator20US 6,708,489 B2Parker & Harper Companies, Inc. · 2004
- Hybrid electric/hydraulic drive system13US 6,126,401 AComputer Graphics Systems Development Corporation · 2000
- Fail-safe actuation system4US 9,850,916 B2Moog Inc. · 2017