F15B 2211/30
Directional control
F15B2211/30 (Directional control) appears on 3,450 US grants and 2,978 published applications in this corpus.
Search patents in F15B- Granted patents
- 3,450
- Published applications
- 2,978
- Assignees
- 1,080
- Inventors
- 5,080
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 53 | 0 |
| 1977 | 34 | 0 |
| 1978 | 33 | 0 |
| 1979 | 32 | 0 |
| 1980 | 31 | 0 |
| 1981 | 24 | 0 |
| 1982 | 33 | 0 |
| 1983 | 24 | 0 |
| 1984 | 21 | 0 |
| 1985 | 29 | 0 |
| 1986 | 22 | 0 |
| 1987 | 28 | 0 |
| 1988 | 31 | 0 |
| 1989 | 19 | 0 |
| 1990 | 19 | 0 |
| 1991 | 34 | 0 |
| 1992 | 33 | 0 |
| 1993 | 28 | 0 |
| 1994 | 40 | 0 |
| 1995 | 29 | 0 |
| 1996 | 29 | 0 |
| 1997 | 25 | 0 |
| 1998 | 47 | 0 |
| 1999 | 43 | 0 |
| 2000 | 55 | 0 |
| 2001 | 85 | 10 |
| 2002 | 63 | 49 |
| 2003 | 56 | 88 |
| 2004 | 76 | 76 |
| 2005 | 67 | 70 |
| 2006 | 50 | 74 |
| 2007 | 57 | 88 |
| 2008 | 54 | 76 |
| 2009 | 54 | 90 |
| 2010 | 47 | 71 |
| 2011 | 67 | 82 |
| 2012 | 43 | 74 |
| 2013 | 67 | 121 |
| 2014 | 83 | 115 |
| 2015 | 93 | 155 |
| 2016 | 109 | 138 |
| 2017 | 135 | 144 |
| 2018 | 135 | 170 |
| 2019 | 178 | 188 |
| 2020 | 203 | 208 |
| 2021 | 197 | 201 |
| 2022 | 179 | 169 |
| 2023 | 156 | 155 |
| 2024 | 147 | 151 |
| 2025 | 163 | 143 |
| 2026 | 90 | 72 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F15B 2211/305Characterised by the type of valvesIndexing code2,793
- F15B 2211/32Characterised by the type of actuationIndexing code1,746
- F15B 2211/31Characterised by the positions of the valve elementIndexing code1,335
- F15B 2211/315Characterised by the connections of the valve or valves in the circuitIndexing code724
- F15B 2211/35Directional control combined with flow controlIndexing code427
- F15B 2211/355Pilot pressure controlIndexing code286
- F15B 2211/365Directional control combined with flow control and pressure controlIndexing code70
- F15B 2211/36Pilot pressure sensingIndexing code62
Recent patents
- Construction machine6 Oct 2026US 12,753,569 B2Hitachi Construction Machinery Co., Ltd.
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Fluid control assembly and system29 Sep 2026US 12,747,802 B2Precision Planting LLC
- Valve section and hydraulic valve assembly22 Sep 2026US 12,742,463 B2HAWE Hydraulik SE
- Hybrid electro-hydraulic load sensing system and control method thereof15 Sep 2026US 12,736,067 B2Chongqing University
- Hauling Vehicle27 Aug 2026US 2026/0249901 A1Hitachi Construction Machinery Co., Ltd.
- Transport vehicle20 Aug 2026US 2026/0241846 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic system management method for machine control13 Aug 2026US 2026/0234895 A1Deere & Company
- Work Machine13 Aug 2026US 2026/0234907 A1Hitachi Construction Machinery Co., Ltd.
- Load dampening system13 Aug 2026US 2026/0235142 A1J. C. Bamford Excavators Limited
Most cited
By later US patents
- Pneumatically operated mechanism1,103US 6,050,172 AEmhart Glass S. A. · 2000
- Hydraulic circuit for automatic transmission1,004US 9,488,197 B2Hyundai Motor Company · 2016
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Linear servoactuator with integrated transformer position sensor158US 4,628,499 AScientific-Atlanta, Inc. · 1986
- Force-controlled hydro-elastic actuator139US 6,494,039 B2Massachusetts Institute of Technology · 2002