F15B 20/00
Safety arrangements for fluid actuator systems
Official title: Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
F15B20/00 (Safety arrangements for fluid actuator systems) appears on 922 US grants and 912 published applications in this corpus.
Search patents in F15B- Granted patents
- 922
- Published applications
- 912
- Assignees
- 486
- Inventors
- 1,975
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 12 | 0 |
| 1982 | 8 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 10 | 0 |
| 2001 | 19 | 5 |
| 2002 | 13 | 11 |
| 2003 | 12 | 19 |
| 2004 | 16 | 20 |
| 2005 | 20 | 26 |
| 2006 | 15 | 14 |
| 2007 | 11 | 20 |
| 2008 | 14 | 23 |
| 2009 | 15 | 17 |
| 2010 | 10 | 13 |
| 2011 | 11 | 19 |
| 2012 | 15 | 22 |
| 2013 | 16 | 19 |
| 2014 | 14 | 41 |
| 2015 | 25 | 35 |
| 2016 | 30 | 42 |
| 2017 | 33 | 46 |
| 2018 | 41 | 68 |
| 2019 | 53 | 70 |
| 2020 | 66 | 77 |
| 2021 | 68 | 63 |
| 2022 | 68 | 60 |
| 2023 | 56 | 59 |
| 2024 | 57 | 44 |
| 2025 | 45 | 53 |
| 2026 | 29 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pressure accumulator1 Sep 2026US 12,723,602 B2Hydac Technology GmbH
- Hydraulic cylinder monitoring11 Aug 2026US 12,704,137 B2The Heil Co.
- Protection for a circuit for controlling the orientation of propeller blades of an aircraft engine7 Jul 2026US 12,674,475 B2Safran Aircraft Engines
- Lay flat or poly hose hydraulic squeeze off tool30 Jun 2026US 12,669,183 B2
- Control device of a pneumatic element23 Jun 2026US 12,663,024 B2Gimatic S.p.A.
- Automation and control system applied to energy generation systems in hydroelectric plants1 Oct 2026US 2026/0298193 A1Reivax AutomaçãO E Controle Ltda.
- Hauling Vehicle27 Aug 2026US 2026/0249901 A1Hitachi Construction Machinery Co., Ltd.
- Transport vehicle20 Aug 2026US 2026/0241846 A1Hitachi Construction Machinery Co., Ltd.
- Leakage cause discrimination system and leakage cause discrimination method20 Aug 2026US 2026/0243281 A1KYB Corporation
- Field replaceable electronic return for actuator13 Aug 2026US 2026/0238035 A1Schneider Electric Buildings Americas, Inc.
Most cited
By later US patents
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Electro-hydraulic power steering system98US 6,298,941 B12001
- Valve and position control using magnetorheological fluids74US 7,428,922 B2Halliburton Energy Services.Inc. · 2008
- Precision electro-hydraulic actuator positioning system57US 6,575,264 B2Dana Corporation · 2003
- Electronically controlled hydraulic actuating system51US 6,625,982 B2Airbus France · 2003