F15B 2211/50
Pressure control
F15B2211/50 (Pressure control) appears on 1,880 US grants and 1,560 published applications in this corpus.
Search patents in F15B- Granted patents
- 1,880
- Published applications
- 1,560
- Assignees
- 731
- Inventors
- 3,162
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 39 | 0 |
| 1977 | 27 | 0 |
| 1978 | 21 | 0 |
| 1979 | 20 | 0 |
| 1980 | 15 | 0 |
| 1981 | 20 | 0 |
| 1982 | 12 | 0 |
| 1983 | 7 | 0 |
| 1984 | 11 | 0 |
| 1985 | 12 | 0 |
| 1986 | 14 | 0 |
| 1987 | 10 | 0 |
| 1988 | 15 | 0 |
| 1989 | 12 | 0 |
| 1990 | 12 | 0 |
| 1991 | 22 | 0 |
| 1992 | 18 | 0 |
| 1993 | 19 | 0 |
| 1994 | 19 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 13 | 0 |
| 1998 | 32 | 0 |
| 1999 | 31 | 0 |
| 2000 | 21 | 0 |
| 2001 | 55 | 6 |
| 2002 | 43 | 25 |
| 2003 | 33 | 52 |
| 2004 | 37 | 39 |
| 2005 | 41 | 42 |
| 2006 | 31 | 44 |
| 2007 | 27 | 47 |
| 2008 | 26 | 47 |
| 2009 | 36 | 36 |
| 2010 | 31 | 54 |
| 2011 | 34 | 37 |
| 2012 | 30 | 42 |
| 2013 | 41 | 50 |
| 2014 | 44 | 51 |
| 2015 | 39 | 83 |
| 2016 | 49 | 64 |
| 2017 | 57 | 75 |
| 2018 | 60 | 90 |
| 2019 | 99 | 93 |
| 2020 | 109 | 112 |
| 2021 | 110 | 93 |
| 2022 | 104 | 100 |
| 2023 | 78 | 73 |
| 2024 | 84 | 86 |
| 2025 | 79 | 80 |
| 2026 | 49 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F15B 2211/505Characterised by the type of pressure control meansIndexing code1,609
- F15B 2211/515Characterised by the connections of the pressure control means in the circuitIndexing code777
- F15B 2211/52Characterised by the type of actuationIndexing code551
- F15B 2211/55For limiting a pressure up to a maximum pressureIndexing code409
- F15B 2211/575Pilot pressure controlIndexing code212
- F15B 2211/57Control of a differential pressureIndexing code142
- F15B 2211/51Characterised by the positions of the valve elementIndexing code115
- F15B 2211/555For assuring a minimum pressureIndexing code89
Recent patents
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Valve section and hydraulic valve assembly22 Sep 2026US 12,742,463 B2HAWE Hydraulik SE
- Work machine accessory motor load protection8 Sep 2026US 12,729,699 B2Caterpillar Inc.
- Hydraulic power steering system25 Aug 2026US 12,715,501 B2Hydac New Technologies GmbH
- Vegetation management machine to clear the ground along a fence or row4 Aug 2026US 12,696,842 B2Dragone S.R.L.
- Fluid pressure circuit3 Sep 2026US 2026/0258821 A1Eagle Industry Co., Ltd.
- Method Of Adjusting Relief Pressure Of Relief Valve For Swing Motor13 Aug 2026US 2026/0234899 A1Caterpillar SARL
- Work Machine13 Aug 2026US 2026/0234907 A1Hitachi Construction Machinery Co., Ltd.
- Load dampening system13 Aug 2026US 2026/0235142 A1J. C. Bamford Excavators Limited
- Integrated Electrohydraulic Actuator30 Jul 2026US 2026/0218734 A1Parker-Hannifin Corporation
Most cited
By later US patents
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Enhanced computer optimized adaptive suspension system and method196US 6,502,837 B1Kenmar Company Trust · 2003
- Enhanced computer optimized adaptive suspension system and method172US 7,076,351 B2Great Northern Technologies, LLC · 2006
- Fluid power distribution and control system111US 10,161,423 B2Sauer-Danfoss ApS · 2018
- Hydraulic system providing down force on a work implement109US 6,460,623 B1Caterpillar Inc. · 2002