F15B 2211/6055
Using pressure relief valves
Official title: using pressure relief valves
F15B2211/6055 (Using pressure relief valves) appears on 133 US grants and 68 published applications in this corpus.
Search patents in F15B- Granted patents
- 133
- Published applications
- 68
- Assignees
- 66
- Inventors
- 247
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 3 |
| 2003 | 3 | 2 |
| 2004 | 1 | 5 |
| 2005 | 6 | 4 |
| 2006 | 3 | 3 |
| 2007 | 2 | 2 |
| 2008 | 3 | 1 |
| 2009 | 0 | 3 |
| 2010 | 1 | 2 |
| 2011 | 3 | 2 |
| 2012 | 1 | 0 |
| 2013 | 2 | 3 |
| 2014 | 0 | 2 |
| 2015 | 2 | 3 |
| 2016 | 0 | 1 |
| 2017 | 1 | 5 |
| 2018 | 4 | 3 |
| 2019 | 4 | 2 |
| 2020 | 3 | 5 |
| 2021 | 4 | 3 |
| 2022 | 5 | 5 |
| 2023 | 7 | 1 |
| 2024 | 0 | 3 |
| 2025 | 3 | 4 |
| 2026 | 3 | 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.
- Floating control system for fixed displacement pump system24 Feb 2026US 12,560,183 B2Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Actuator deadhead/stall detection in a load sense hydraulic system6 Jan 2026US 12,516,687 B2Danfoss A/S
- Hydraulic control system in working machine22 Jul 2025US 12,366,054 B2Caterpillar SARL
- Load-controlled hydraulic supply for an attachment attached to an agricultural tractor8 Jul 2025US 12,352,292 B2Deere & Company
- Valve section and hydraulic valve assembly1 Jan 2026US 2026/0002550 A1HAWE Hydraulik SE
- Valve block, and multi-control valve device having same12 Jun 2025US 2025/0188960 A1
- Hydraulic control system in working machine27 Feb 2025US 2025/0067023 A1Caterpillar SARL
- Floating control system for fixed displacement pump system30 Jan 2025US 2025/0035133 A1Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Arrangement for operating a load-controlled hydraulic system of an agricultural tractor2 Jan 2025US 2025/0003430 A1Deere & Company
Most cited
By later US patents
- Control for load sharing pumps49US 4,345,436 ACaterpillar Tractor Co. · 1982
- Series - parallel selector for steering and implement47US 4,343,151 ACaterpillar Tractor Co. · 1982
- Fluid system with flow compensated torque control45US 4,481,770 ACaterpillar Tractor Co. · 1984
- Fast response load sense control system41US 4,986,071 AKomatsu Dresser Company · 1991
- Pressure compensating hydraulic control system41US 5,579,642 AHUSCO International, Inc. · 1996