F15B 2211/50545
Using braking valves to maintain a back pressure
Official title: using braking valves to maintain a back pressure
F15B2211/50545 (Using braking valves to maintain a back pressure) appears on 94 US grants and 77 published applications in this corpus.
Search patents in F15B- Granted patents
- 94
- Published applications
- 77
- Assignees
- 65
- Inventors
- 162
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 0 |
| 2003 | 2 | 2 |
| 2004 | 0 | 2 |
| 2005 | 5 | 5 |
| 2006 | 3 | 2 |
| 2007 | 0 | 8 |
| 2008 | 6 | 3 |
| 2009 | 5 | 2 |
| 2010 | 3 | 7 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 4 | 2 |
| 2014 | 4 | 4 |
| 2015 | 1 | 4 |
| 2016 | 2 | 2 |
| 2017 | 2 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 7 |
| 2020 | 5 | 1 |
| 2021 | 5 | 4 |
| 2022 | 4 | 3 |
| 2023 | 2 | 5 |
| 2024 | 3 | 6 |
| 2025 | 6 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Variable relief circuit19 May 2026US 12,631,201 B2HUSCO International, Inc.
- Load-handling vehicle3 Feb 2026US 12,540,062 B2Manitou Bf
- Systems and methods for control and monitoring of actuated valves18 Nov 2025US 12,474,228 B2Swagelok Company
- Hydraulic system, excavator, and control method of excavator14 Oct 2025US 12,442,160 B2Komatsu Ltd.
- Fork leveling system and method, and telescopic boom forklift9 Sep 2025US 12,410,046 B2Sany Marine Heavy Industry Co., Ltd.
- Systems and methods for control and monitoring of actuated valves19 Mar 2026US 2026/0079063 A1Swagelok Company
- Hydraulic system, excavator, and control method of excavator18 Sep 2025US 2025/0290287 A1Komatsu Ltd.
- Systems and Methods for a Return Manifold16 May 2024US 2024/0159256 A1HUSCO International, Inc.
- Valve section and hydraulic system with a valve section18 Apr 2024US 2024/0125396 A1
- Systems and methods for control and monitoring of actuated valves18 Apr 2024US 2024/0125666 A1Swagelok Company
Most cited
By later US patents
- Balanced pilot operated check valve61US 8,262,058 B22012
- Reverse differential holding valve41US 4,172,582 ARexnord Inc. · 1979
- Hydrostatic drive systems31US 4,425,759 ALinde Aktiengesellschaft · 1984
- Hydraulic circuit31US 6,367,365 B1Mannesmann Rexroth GmbH · 2002
- Hydraulic control system for working machine27US 7,392,653 B2Kobelco Construction Machinery Co., Ltd. · 2008