F15B 2211/20
Fluid pressure source
Official title: Fluid pressure source, e.g. accumulator or variable axial piston pump
F15B2211/20 (Fluid pressure source) appears on 3,371 US grants and 3,079 published applications in this corpus.
Search patents in F15B- Granted patents
- 3,371
- Published applications
- 3,079
- Assignees
- 1,056
- Inventors
- 5,139
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 52 | 0 |
| 1977 | 31 | 0 |
| 1978 | 31 | 0 |
| 1979 | 31 | 0 |
| 1980 | 25 | 0 |
| 1981 | 16 | 0 |
| 1982 | 28 | 0 |
| 1983 | 19 | 0 |
| 1984 | 20 | 0 |
| 1985 | 26 | 0 |
| 1986 | 16 | 0 |
| 1987 | 21 | 0 |
| 1988 | 19 | 0 |
| 1989 | 14 | 0 |
| 1990 | 16 | 0 |
| 1991 | 29 | 0 |
| 1992 | 30 | 0 |
| 1993 | 26 | 0 |
| 1994 | 38 | 0 |
| 1995 | 31 | 0 |
| 1996 | 30 | 0 |
| 1997 | 25 | 0 |
| 1998 | 36 | 0 |
| 1999 | 38 | 0 |
| 2000 | 50 | 0 |
| 2001 | 68 | 7 |
| 2002 | 58 | 42 |
| 2003 | 44 | 65 |
| 2004 | 49 | 60 |
| 2005 | 57 | 68 |
| 2006 | 45 | 71 |
| 2007 | 61 | 88 |
| 2008 | 52 | 84 |
| 2009 | 59 | 121 |
| 2010 | 46 | 91 |
| 2011 | 67 | 88 |
| 2012 | 56 | 92 |
| 2013 | 95 | 156 |
| 2014 | 93 | 134 |
| 2015 | 100 | 198 |
| 2016 | 126 | 174 |
| 2017 | 162 | 166 |
| 2018 | 155 | 196 |
| 2019 | 206 | 179 |
| 2020 | 193 | 176 |
| 2021 | 215 | 174 |
| 2022 | 156 | 173 |
| 2023 | 147 | 140 |
| 2024 | 131 | 139 |
| 2025 | 145 | 123 |
| 2026 | 87 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F15B 2211/205Systems with pumpsIndexing code3,061
- F15B 2211/21Systems with pressure sources other than pumpsIndexing code679
- F15B 2211/27Directional control by means of the pressure sourceIndexing code329
- F15B 2211/25Pressure control functionsIndexing code321
- F15B 2211/265Control of multiple pressure sourcesIndexing code168
- F15B 2211/255Flow control functionsIndexing code141
- F15B 2211/275Control of the prime moverIndexing code59
- F15B 2211/26Power control functionsIndexing code40
Recent patents
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Electrohydraulic control device and adjustable hydraulic pump system6 Oct 2026US 12,753,781 B2HAWE Hydraulik SE
- Solenoid concept for pump control of a variable displacement piston pump29 Sep 2026US 12,747,727 B2Hamilton Sundstrand Corporation
- Hybrid electro-hydraulic load sensing system and control method thereof15 Sep 2026US 12,736,067 B2Chongqing University
- Work machine accessory motor load protection8 Sep 2026US 12,729,699 B2Caterpillar Inc.
- Hydraulic system for a refuse vehicle1 Oct 2026US 2026/0296342 A1Oshkosh Corporation
- Methods of robust electrohydraulic pressure control with distributed damping17 Sep 2026US 2026/0276103 A1Sunstream Scientific, Inc.
- Route planning based control of a refuse vehicle hydraulic system3 Sep 2026US 2026/0257638 A1Oshkosh Corporation
- Hauling Vehicle27 Aug 2026US 2026/0249901 A1Hitachi Construction Machinery Co., Ltd.
- Drive mechanism and tilt-trim device27 Aug 2026US 2026/0249968 A1Astemo, Ltd.
Most cited
By later US patents
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Dynamic activation of pumps of a fluid power system166US 10,040,541 B2The Boeing Company · 2018
- 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
- Fluid power distribution and control system111US 10,161,423 B2Sauer-Danfoss ApS · 2018