F15B 2211/8636
Circuit failure
Official title: Circuit failure, e.g. valve or hose failure
F15B2211/8636 (Circuit failure) appears on 179 US grants and 216 published applications in this corpus.
Search patents in F15B- Granted patents
- 179
- Published applications
- 216
- Assignees
- 132
- Inventors
- 467
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 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 | 1 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 2 | 2 |
| 2007 | 2 | 2 |
| 2008 | 2 | 7 |
| 2009 | 1 | 4 |
| 2010 | 2 | 4 |
| 2011 | 5 | 4 |
| 2012 | 4 | 3 |
| 2013 | 2 | 3 |
| 2014 | 5 | 14 |
| 2015 | 5 | 6 |
| 2016 | 8 | 8 |
| 2017 | 6 | 5 |
| 2018 | 7 | 15 |
| 2019 | 13 | 18 |
| 2020 | 7 | 18 |
| 2021 | 15 | 22 |
| 2022 | 19 | 17 |
| 2023 | 18 | 21 |
| 2024 | 17 | 13 |
| 2025 | 18 | 15 |
| 2026 | 8 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic power steering system25 Aug 2026US 12,715,501 B2Hydac New Technologies GmbH
- Protection for a circuit for controlling the orientation of propeller blades of an aircraft engine7 Jul 2026US 12,674,475 B2Safran Aircraft Engines
- Hydraulic control system and method with electro-proportional pressure valve and integral check5 May 2026US 12,618,424 B2HydraForce, Inc.
- Floating control system for fixed displacement pump system24 Feb 2026US 12,560,183 B2Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Manifold system for 2003 configuration17 Feb 2026US 12,553,454 B2Rotex Automation Limited
- Hauling Vehicle27 Aug 2026US 2026/0249901 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic Device with a Status Display16 Jul 2026US 2026/0201913 A1Robert Bosch GmbH
- Construction machine9 Jul 2026US 2026/0193869 A1Hitachi Construction Machinery Co., Ltd.
- Triple redundancy assembly in process control systems18 Jun 2026US 2026/0169506 A1Rotex Automation Limited
- Transfer valve with dual authority control porting7 May 2026US 2026/0126060 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve41US 7,487,707 B2HUSCO International, Inc. · 2009
- Hydraulic system with a dynamic seal32US 9,651,067 B2Caterpillar Inc. · 2017
- Valve arrangement25US 7,398,796 B2Sauer-Danfoss ApS · 2008
- Methods and apparatus to enable boom bounce reduction and prevent un-commanded motion in hydraulic systems17US 10,323,663 B2Eaton Intelligent Power Limited · 2019
- Load control system17US 4,610,193 ADeere & Company · 1986