F15B 2211/3122
Special positions other than the pump port being connected to working ports
Official title: Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
F15B2211/3122 (Special positions other than the pump port being connected to working ports) appears on 281 US grants and 247 published applications in this corpus.
Search patents in F15B- Granted patents
- 281
- Published applications
- 247
- Assignees
- 155
- Inventors
- 576
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 1 |
| 2002 | 11 | 7 |
| 2003 | 4 | 10 |
| 2004 | 10 | 13 |
| 2005 | 11 | 7 |
| 2006 | 4 | 3 |
| 2007 | 3 | 10 |
| 2008 | 3 | 4 |
| 2009 | 6 | 15 |
| 2010 | 5 | 7 |
| 2011 | 8 | 6 |
| 2012 | 6 | 5 |
| 2013 | 6 | 11 |
| 2014 | 6 | 7 |
| 2015 | 6 | 10 |
| 2016 | 11 | 11 |
| 2017 | 5 | 10 |
| 2018 | 14 | 9 |
| 2019 | 10 | 11 |
| 2020 | 11 | 17 |
| 2021 | 19 | 19 |
| 2022 | 13 | 12 |
| 2023 | 10 | 12 |
| 2024 | 15 | 14 |
| 2025 | 10 | 11 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Energy storage and reutilization for a single-rod electro-hydrostatic actuator9 Jun 2026US 12,650,138 B2University of Manitoba
- Hydraulic distributor with compensation device for directional valves5 May 2026US 12,618,422 B2Walvoil S.P.A.
- Control method for executing a floating function of a boom, corresponding control systems and work vehicles comprising such control systems17 Mar 2026US 12,577,756 B2CNH Industrial Italia S.p.A.
- Floating control system for fixed displacement pump system24 Feb 2026US 12,560,183 B2Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Method for controlling working machine and working machine6 Jan 2026US 12,516,503 B2Yanmar Holdings Co., Ltd.
- Work machine6 Aug 2026US 2026/0226927 A1Komatsu Ltd.
- Bulldozing hydraulic system with bulldozing blade floating function and excavator11 Jun 2026US 2026/0160045 A1Xuzhou XCMG Excavator Machinery Co., Ltd.
- Asphalt finisher4 Jun 2026US 2026/0152905 A1Sumitomo Construction Machinery Co., Ltd.
- Hydraulic control device, hydraulic circuit control method, and hydraulic device29 Jan 2026US 2026/0029003 A1Kubota Corporation
- Hydraulic force fight mitigation8 Jan 2026US 2026/0009408 A1Woodward, Inc.
Most cited
By later US patents
- Fluid power distribution and control system111US 10,161,423 B2Sauer-Danfoss ApS · 2018
- Variable rate meter drive system51US 6,851,377 B2CNH Canada, Ltd. · 2005
- Hydraulic control device47US 5,259,293 AHeilmeier & Weinlein Fabrik fuer Oel-Hydraulik GmbH & Co. KG · 1993
- Load sensing hydraulic circuit having power matching means33US 4,024,710 AKoehring Company · 1977
- Work machine33US 7,596,893 B2Caterpillar Japan Ltd. · 2009