F15B 11/05
Specially adapted to maintain constant speed
Official title: specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive {(F15B11/161 takes precedence)}
F15B11/05 (Specially adapted to maintain constant speed) appears on 237 US grants and 166 published applications in this corpus.
Search patents in F15B- Granted patents
- 237
- Published applications
- 166
- Assignees
- 125
- Inventors
- 450
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 9 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 6 | 0 |
| 2001 | 10 | 1 |
| 2002 | 3 | 3 |
| 2003 | 3 | 6 |
| 2004 | 4 | 3 |
| 2005 | 2 | 6 |
| 2006 | 5 | 16 |
| 2007 | 10 | 9 |
| 2008 | 7 | 11 |
| 2009 | 5 | 10 |
| 2010 | 6 | 6 |
| 2011 | 10 | 8 |
| 2012 | 3 | 8 |
| 2013 | 8 | 4 |
| 2014 | 7 | 1 |
| 2015 | 4 | 4 |
| 2016 | 1 | 0 |
| 2017 | 3 | 6 |
| 2018 | 4 | 6 |
| 2019 | 4 | 8 |
| 2020 | 16 | 15 |
| 2021 | 4 | 7 |
| 2022 | 10 | 4 |
| 2023 | 3 | 7 |
| 2024 | 4 | 10 |
| 2025 | 10 | 5 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic distributor with pressure compensator for directional valves18 Aug 2026US 12,710,062 B2Walvoil S.P.A.
- Hydraulic system for working machine3 Mar 2026US 12,565,759 B2Kubota Corporation
- Floating control system for fixed displacement pump system24 Feb 2026US 12,560,183 B2Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Hydraulic system for pitch angle adjustment of a rotor blade of a wind turbine and wind turbine with such a hydraulic system17 Feb 2026US 12,553,412 B2HAWE Hydraulik SE
- System and method for controlling hydraulic fluid flow within a work vehicle13 Jan 2026US 12,523,014 B2CNH Industrial America LLC
- Bulldozing hydraulic system with bulldozing blade floating function and excavator11 Jun 2026US 2026/0160045 A1Xuzhou XCMG Excavator Machinery Co., Ltd.
- Pressure compensation valve and hydraulic control system28 May 2026US 2026/0145919 A1Zhejiang Senstren Technology Co., LTD
- System and method for controlling hydraulic fluid flow within a work vehicle9 Oct 2025US 2025/0314046 A1CNH Industrial America LLC
- Hydraulic drive device19 Jun 2025US 2025/0198428 A1Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic system for pitch angle adjustment of a rotor blade of a wind turbine and wind turbine with such a hydraulic system17 Apr 2025US 2025/0122862 A1HAWE Hydraulik SE
Most cited
By later US patents
- Control system for automatically controlling actuators of an excavator57US 5,361,211 ASamsung Heavy Industries Co., Ltd. · 1994
- Pilot solenoid control valve and hydraulic control system using same49US 5,878,647 AHUSCO International, Inc. · 1999
- Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve41US 7,487,707 B2HUSCO International, Inc. · 2009
- High pressure hydraulic system38US 4,250,794 ACaterpillar Tractor Co. · 1981
- Hydraulic circuit31US 6,367,365 B1Mannesmann Rexroth GmbH · 2002