F15B 2211/50518
Using pressure relief valves
Official title: using pressure relief valves
F15B2211/50518 (Using pressure relief valves) appears on 728 US grants and 575 published applications in this corpus.
Search patents in F15B- Granted patents
- 728
- Published applications
- 575
- Assignees
- 351
- Inventors
- 1,411
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 19 | 0 |
| 1978 | 9 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 11 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 3 | 0 |
| 1998 | 17 | 0 |
| 1999 | 15 | 0 |
| 2000 | 10 | 0 |
| 2001 | 23 | 1 |
| 2002 | 20 | 8 |
| 2003 | 11 | 23 |
| 2004 | 13 | 16 |
| 2005 | 15 | 20 |
| 2006 | 14 | 11 |
| 2007 | 10 | 21 |
| 2008 | 13 | 26 |
| 2009 | 12 | 13 |
| 2010 | 12 | 15 |
| 2011 | 13 | 19 |
| 2012 | 7 | 12 |
| 2013 | 17 | 23 |
| 2014 | 20 | 24 |
| 2015 | 20 | 32 |
| 2016 | 22 | 22 |
| 2017 | 21 | 15 |
| 2018 | 21 | 27 |
| 2019 | 28 | 30 |
| 2020 | 30 | 32 |
| 2021 | 34 | 27 |
| 2022 | 31 | 40 |
| 2023 | 29 | 23 |
| 2024 | 31 | 38 |
| 2025 | 35 | 37 |
| 2026 | 17 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic jack assemblies28 Jul 2026US 12,692,139 B2
- Safety valve, pneumatic actuator, and vehicle23 Jun 2026US 12,663,025 B2Zf Cv Systems Europe BV
- Electro-hydraulic actuator with a pilot-actuated float mode16 Jun 2026US 12,655,918 B2Parker-Hannifin Corporation
- 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
- Method Of Adjusting Relief Pressure Of Relief Valve For Swing Motor13 Aug 2026US 2026/0234899 A1Caterpillar SARL
- Integrated Electrohydraulic Actuator30 Jul 2026US 2026/0218734 A1Parker-Hannifin Corporation
- Fluid pressure cylinder2 Jul 2026US 2026/0185549 A1KYB Corporation
- Hydraulic System having an Inertia Charging Arrangement25 Jun 2026US 2026/0177086 A1Robert Bosch GmbH
- Electro-Hydraulic Actuator Assembly with a Fluid Access Port11 Jun 2026US 2026/0160279 A1Parker-Hannifin Corporation
Most cited
By later US patents
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Hydraulic system, manifold and volumetric compensator73US 6,519,939 B1M-Mac Actuators, Inc. · 2003
- Shovel64US 6,789,335 B1Kobelco Construction Machinery Co., Ltd. · 2004
- Hydraulic valve module63US 4,170,214 ADouble A Products Company · 1979
- Multiple utilization of blow-mold air54US 5,648,026 AKrupp Corpoplast Maschinenbau GmbH · 1997