F15B 2211/555
For assuring a minimum pressure
Official title: for assuring a minimum pressure, e.g. by using a back pressure valve
F15B2211/555 (For assuring a minimum pressure) appears on 89 US grants and 54 published applications in this corpus.
Search patents in F15B- Granted patents
- 89
- Published applications
- 54
- Assignees
- 63
- Inventors
- 140
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 6 | 1 |
| 2003 | 2 | 3 |
| 2004 | 0 | 1 |
| 2005 | 2 | 3 |
| 2006 | 1 | 2 |
| 2007 | 3 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 4 |
| 2011 | 0 | 0 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 3 |
| 2016 | 0 | 1 |
| 2017 | 3 | 0 |
| 2018 | 3 | 2 |
| 2019 | 1 | 4 |
| 2020 | 1 | 2 |
| 2021 | 4 | 8 |
| 2022 | 6 | 2 |
| 2023 | 4 | 4 |
| 2024 | 3 | 4 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic circuit for a construction machine27 Jan 2026US 12,534,882 B2Caterpillar SARL
- Systems and methods for control and monitoring of actuated valves18 Nov 2025US 12,474,228 B2Swagelok Company
- Equalized hydraulic clamp force control22 Jul 2025US RE50,500 E1Cascade Corporation
- Elevatable chamber and method of operating the same24 Jun 2025US 12,338,903 B2LG Energy Solution, Ltd.
- Hydraulic machine5 Nov 2024US 12,135,046 B2Volvo Construction Equipment AB
- Hydraulic System having an Inertia Charging Arrangement25 Jun 2026US 2026/0177086 A1Robert Bosch GmbH
- Systems and methods for control and monitoring of actuated valves19 Mar 2026US 2026/0079063 A1Swagelok Company
- Hydraulic circuit for a construction machine2 Oct 2025US 2025/0305246 A1Caterpillar SARL
- Elevatable chamber and method of operating the same26 Dec 2024US 2024/0426386 A1LG Energy Solution, Ltd.
- Systems and Methods for a Return Manifold16 May 2024US 2024/0159256 A1HUSCO International, Inc.
Most cited
By later US patents
- 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
- Load responsive fluid control valves21US 3,984,979 A1976
- Remote controlled hydraulic circuit having selector means for establishing priority therein20US 4,508,013 AFiatallis Europe, S.p.A. · 1985