F15B 2211/5151
Being connected to a pressure source and a directional control valve
Official title: being connected to a pressure source and a directional control valve
F15B2211/5151 (Being connected to a pressure source and a directional control valve) appears on 218 US grants and 139 published applications in this corpus.
Search patents in F15B- Granted patents
- 218
- Published applications
- 139
- Assignees
- 147
- Inventors
- 448
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 3 |
| 2002 | 8 | 5 |
| 2003 | 2 | 10 |
| 2004 | 9 | 10 |
| 2005 | 7 | 10 |
| 2006 | 6 | 5 |
| 2007 | 5 | 6 |
| 2008 | 6 | 5 |
| 2009 | 4 | 2 |
| 2010 | 3 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 5 |
| 2016 | 2 | 5 |
| 2017 | 6 | 7 |
| 2018 | 3 | 10 |
| 2019 | 6 | 4 |
| 2020 | 10 | 5 |
| 2021 | 4 | 3 |
| 2022 | 3 | 6 |
| 2023 | 2 | 9 |
| 2024 | 7 | 11 |
| 2025 | 7 | 12 |
| 2026 | 6 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic power steering system25 Aug 2026US 12,715,501 B2Hydac New Technologies GmbH
- Volume follow supply9 Jun 2026US 12,650,135 B2Hydac Fluidtechnik GmbH
- Variable relief circuit19 May 2026US 12,631,201 B2HUSCO International, Inc.
- Hydraulic system for work machine, work machine, and method for controlling hydraulic system28 Apr 2026US 12,612,757 B2Komatsu Ltd.
- Safety system for machine14 Apr 2026US 12,601,150 B2Oilquick AB
- Fluid pressure circuit3 Sep 2026US 2026/0258821 A1Eagle Industry Co., Ltd.
- Systems and methods for control and monitoring of actuated valves19 Mar 2026US 2026/0079063 A1Swagelok Company
- Work machine accessory motor load protection11 Dec 2025US 2025/0376995 A1Caterpillar Inc.
- Fluid control device, fluid pressure supply apparatus, and fluid control method11 Dec 2025US 2025/0377673 A1SMC Corporation
- Volume Follow Supply4 Dec 2025US 2025/0369458 A1Hydac Fluidtechnik GmbH
Most cited
By later US patents
- Hydraulic system for supplying hydraulic fluid to a hydraulically operated device alternately at pressures of different value71US 4,142,368 AWelko Industriale S.p.A. · 1979
- Apparatus and method for controlling a rated system pressure56US 6,273,686 B1A. Roemheld GmbH & Co KG · 2001
- Pneumatic cylinder with integral concentric hydraulic cylinder-type axially compact brake51US 4,907,495 A1990
- Proportional seat-type 4-way valve47US 5,211,196 AHydrolux S.a r.l. · 1993
- Hydrostatic drive systems31US 4,425,759 ALinde Aktiengesellschaft · 1984