F15B 2211/50536
Using unloading valves controlling the supply pressure by diverting fluid to the
Official title: using unloading valves controlling the supply pressure by diverting fluid to the return line
F15B2211/50536 (Using unloading valves controlling the supply pressure by diverting fluid to the) appears on 418 US grants and 296 published applications in this corpus.
Search patents in F15B- Granted patents
- 418
- Published applications
- 296
- Assignees
- 220
- Inventors
- 824
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 7 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 14 | 2 |
| 2002 | 11 | 5 |
| 2003 | 6 | 12 |
| 2004 | 8 | 14 |
| 2005 | 11 | 9 |
| 2006 | 5 | 10 |
| 2007 | 7 | 13 |
| 2008 | 5 | 6 |
| 2009 | 9 | 5 |
| 2010 | 4 | 6 |
| 2011 | 6 | 4 |
| 2012 | 1 | 6 |
| 2013 | 7 | 9 |
| 2014 | 5 | 15 |
| 2015 | 8 | 10 |
| 2016 | 13 | 11 |
| 2017 | 12 | 12 |
| 2018 | 9 | 17 |
| 2019 | 11 | 9 |
| 2020 | 18 | 28 |
| 2021 | 31 | 15 |
| 2022 | 16 | 22 |
| 2023 | 17 | 14 |
| 2024 | 12 | 17 |
| 2025 | 15 | 18 |
| 2026 | 12 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Drive control device for rotating work machine and rotating work machine provided with same16 Jun 2026US 12,655,607 B2Kobelco Construction Machinery Co., Ltd.
- Hydraulic machine swing system with anti-drift9 Jun 2026US 12,650,003 B2Caterpillar Inc.
- Volume follow supply9 Jun 2026US 12,650,135 B2Hydac Fluidtechnik GmbH
- Work Machine13 Aug 2026US 2026/0234907 A1Hitachi Construction Machinery Co., Ltd.
- Load dampening system13 Aug 2026US 2026/0235142 A1J. C. Bamford Excavators Limited
- Construction machine9 Jul 2026US 2026/0193869 A1Hitachi Construction Machinery Co., Ltd.
- System and Method for Controlling a Hydraulic Supply System on a Mobile Machine11 Jun 2026US 2026/0160276 A1AGCO International GmbH
- Intermediate hydraulic system and method of use30 Apr 2026US 2026/0117802 A1Country Mechanical Services
Most cited
By later US patents
- Cartridge valve having solenoid bypass and integral relief valve94US 5,992,450 AEaton Corporation · 1999
- 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
- Multiple consumer hydraulic mechanisms60US 4,617,854 ALinde Aktiengesellschaft · 1986
- Apparatus and method for controlling a rated system pressure56US 6,273,686 B1A. Roemheld GmbH & Co KG · 2001
- Automated relief valve control system and method50US 9,273,543 B2S,P.M. Flow Control, Inc. · 2016