F15B 2211/855
Testing of fluid pressure systems
F15B2211/855 (Testing of fluid pressure systems) appears on 54 US grants and 68 published applications in this corpus.
Search patents in F15B- Granted patents
- 54
- Published applications
- 68
- Assignees
- 47
- Inventors
- 155
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 3 | 6 |
| 2018 | 1 | 12 |
| 2019 | 9 | 6 |
| 2020 | 3 | 4 |
| 2021 | 7 | 5 |
| 2022 | 3 | 6 |
| 2023 | 3 | 2 |
| 2024 | 7 | 5 |
| 2025 | 4 | 7 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and application for eliminating gaseous cavitation9 Jun 2026US 12,650,137 B2
- Hydraulic drive system5 May 2026US 12,618,419 B2HMS-HYBRID MOTION SOLUTIONS GmbH
- Hydraulic-pump flow-rate calibration system2 Sep 2025US 12,404,655 B2Kawasaki Jukogyo Kabushiki Kaisha
- Gas network and method for the simultaneous detection of leaks and obstructions in a gas network under pressure or vacuum17 Jun 2025US 12,331,892 B2Atlas Copco Airpower, Naamloze Vennootschap
- Pneumatics system with advanced system diagnostics capabilities25 Feb 2025US 12,234,844 B2Beckman Coulter, Inc.
- Hydraulic or pneumatic actuator for trip valves of steam turbines or turbo-expanders7 May 2026US 2026/0126127 A1Nuovo Pignone Tecnologie Srl
- Systems and methods for autonomous pressure relief valve testing23 Apr 2026US 2026/0110370 A1
- Hydraulic system28 Aug 2025US 2025/0271007 A1HAWE Hydraulik SE
- Hydraulic Drive System21 Aug 2025US 2025/0264117 A1HMS-HYBRID MOTION SOLUTIONS GmbH
- Pneumatics system with advanced system diagnostics capabilities17 Jul 2025US 2025/0230823 A1Beckman Coulter, Inc.
Most cited
By later US patents
- Methods and apparatus to enable boom bounce reduction and prevent un-commanded motion in hydraulic systems17US 10,323,663 B2Eaton Intelligent Power Limited · 2019
- Energy saving and monitoring pneumatic control valve system16US 5,163,353 ARoss Operating Valve Company · 1992
- Method and apparatus for determining the status of a relief valve15US 6,408,676 B1Caterpillar Inc. · 2002
- Differential configuration of remote hydraulic valve flow rates for extend and retract modes of operation13US 6,561,076 B2Case Corporation · 2003
- System and method for identifying impending hydraulic pump failure9US 9,051,945 B2Caterpillar Inc. · 2015