F15B 11/044
By means in the return line
Official title: by means in the return line (F15B11/046, F15B11/05 take precedence)
F15B11/044 (By means in the return line) appears on 362 US grants and 266 published applications in this corpus.
Search patents in F15B- Granted patents
- 362
- Published applications
- 266
- Assignees
- 183
- Inventors
- 586
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 10 | 0 |
| 1979 | 10 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 9 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 12 | 0 |
| 2001 | 10 | 0 |
| 2002 | 4 | 5 |
| 2003 | 10 | 16 |
| 2004 | 9 | 9 |
| 2005 | 9 | 17 |
| 2006 | 11 | 14 |
| 2007 | 14 | 9 |
| 2008 | 10 | 9 |
| 2009 | 8 | 9 |
| 2010 | 7 | 8 |
| 2011 | 4 | 3 |
| 2012 | 2 | 5 |
| 2013 | 6 | 9 |
| 2014 | 7 | 10 |
| 2015 | 5 | 7 |
| 2016 | 9 | 7 |
| 2017 | 8 | 8 |
| 2018 | 6 | 11 |
| 2019 | 14 | 22 |
| 2020 | 17 | 16 |
| 2021 | 20 | 15 |
| 2022 | 11 | 10 |
| 2023 | 10 | 18 |
| 2024 | 12 | 16 |
| 2025 | 23 | 10 |
| 2026 | 6 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid controller21 Jul 2026US 12,687,183 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic drive system5 May 2026US 12,618,421 B2Kawasaki Jukogyo Kabushiki Kaisha
- Movement control device with double balancing21 Apr 2026US 12,607,206 B2Manitou Italia S.R.L.
- Work machine24 Mar 2026US 12,584,295 B2Hitachi Construction Machinery Co., Ltd.
- Lifting mechanism3 Feb 2026US 12,540,061 B2Danfoss Power Solutions Inc.
- Pressure compensation valve and hydraulic control system28 May 2026US 2026/0145919 A1Zhejiang Senstren Technology Co., LTD
- Displacement Power Controllers and Applications5 Mar 2026US 2026/0063150 A1Perisseuma Technologies LLC
- Turbine engine comprising an actuator and aircraft comprising such a turbine engine, and corresponding actuation method1 Jan 2026US 2026/0002474 A1Safran Power Units
- Work Machine21 Aug 2025US 2025/0263909 A1Hitachi Construction Machinery Co., Ltd.
- 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
- Hydraulic circuit and control system therefor115US 5,138,838 ACaterpillar Inc. · 1992
- Fluid power distribution and control system111US 10,161,423 B2Sauer-Danfoss ApS · 2018
- Hydraulic circuit with a return line metering valve and method of operation81US 6,467,264 B1HUSCO International, Inc. · 2002
- Hydraulic system, manifold and volumetric compensator73US 6,519,939 B1M-Mac Actuators, Inc. · 2003
- Hydraulic valve module63US 4,170,214 ADouble A Products Company · 1979