F15B 2211/5156
Being connected to a return line and a directional control valve
Official title: being connected to a return line and a directional control valve
F15B2211/5156 (Being connected to a return line and a directional control valve) appears on 72 US grants and 59 published applications in this corpus.
Search patents in F15B- Granted patents
- 72
- Published applications
- 59
- Assignees
- 56
- Inventors
- 165
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 5 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 4 |
| 2015 | 1 | 3 |
| 2016 | 1 | 2 |
| 2017 | 1 | 1 |
| 2018 | 3 | 3 |
| 2019 | 1 | 6 |
| 2020 | 7 | 4 |
| 2021 | 5 | 3 |
| 2022 | 4 | 6 |
| 2023 | 4 | 6 |
| 2024 | 5 | 10 |
| 2025 | 7 | 3 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Counter pressure valve arrangement10 Jun 2025US 12,326,741 B2Parker Hannifin EMEA S.à.r.l.
- Fluid pressure control device9 Apr 2026US 2026/0099162 A1KYB Corporation
- Hydraulic system and passenger restraint system12 Feb 2026US 2026/0042412 A1HAWE Hydraulik SE
- Agricultural header float arm position and pressure control system16 Oct 2025US 2025/0318462 A1
- Agricultural header float arm position and pressure control system16 Oct 2025US 2025/0318463 A1
- Method and system for a flow-isolated valve arrangement and a three-chamber cylinder hydraulic architecture21 Aug 2025US 2025/0264118 A1Purdue Research Foundation
Most cited
By later US patents
- Regenerative adaptive fluid motor control77US 6,349,543 B12002
- Method of controlling speed change of hydraulic drive device for vehicle and speed change device47US 5,784,883 AKomatsu Ltd. · 1998
- Power transmission27US 4,201,052 ASperry Rand Corporation · 1980
- Hydraulic control device of a working machine25US 6,378,303 B1Kobe Steel, Ltd. · 2002
- Hydraulic control system having a bypass valve24US 5,701,933 ACaterpillar Inc. · 1997