F15B 13/0433
The pilot valves being pressure control valves
Official title: {the pilot valves being pressure control valves (F15B13/0435, F15B13/0436, F15B13/0438 take precedence)}
F15B13/0433 (The pilot valves being pressure control valves) appears on 245 US grants and 230 published applications in this corpus.
Search patents in F15B- Granted patents
- 245
- Published applications
- 230
- Assignees
- 140
- Inventors
- 472
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 2 |
| 2002 | 2 | 4 |
| 2003 | 5 | 5 |
| 2004 | 2 | 3 |
| 2005 | 2 | 3 |
| 2006 | 3 | 5 |
| 2007 | 4 | 10 |
| 2008 | 5 | 7 |
| 2009 | 2 | 10 |
| 2010 | 2 | 4 |
| 2011 | 8 | 4 |
| 2012 | 7 | 13 |
| 2013 | 3 | 3 |
| 2014 | 7 | 8 |
| 2015 | 7 | 5 |
| 2016 | 9 | 6 |
| 2017 | 7 | 10 |
| 2018 | 10 | 8 |
| 2019 | 8 | 16 |
| 2020 | 13 | 12 |
| 2021 | 14 | 18 |
| 2022 | 13 | 22 |
| 2023 | 20 | 17 |
| 2024 | 20 | 17 |
| 2025 | 14 | 13 |
| 2026 | 12 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluid controller21 Jul 2026US 12,687,183 B2Kawasaki Jukogyo Kabushiki Kaisha
- Pilot-control electromagnetic valve30 Jun 2026US 12,669,135 B2Hydac Fluidtechnik GmbH
- Hydraulic control system and method with electro-proportional pressure valve and integral check5 May 2026US 12,618,424 B2HydraForce, Inc.
- Valve21 Apr 2026US 12,607,207 B2Hydac Fluidtechnik GmbH
- Electromagnetic pilot-operated proportional pressure control valve17 Mar 2026US 12,577,965 B2Hydac Fluidtechnik GmbH
- Transport vehicle20 Aug 2026US 2026/0241846 A1Hitachi Construction Machinery Co., Ltd.
- Work Machine13 Aug 2026US 2026/0234907 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic Device with a Status Display16 Jul 2026US 2026/0201913 A1Robert Bosch GmbH
- Work machine5 Mar 2026US 2026/0062885 A1Hitachi Construction Machinery Co., Ltd.
- Valve system and method for operating a pneumatic actuator12 Feb 2026US 2026/0043423 A1Festo AG & Co.
Most cited
By later US patents
- Pilot-operated valve with load pressure feedback48US 4,741,364 ADeere & Company · 1988
- Proportional control valve46US 4,623,118 ADeere & Company · 1986
- Proportional pressure control valve41US 5,836,335 AFluid Power Industries, Inc. · 1998
- Electrohydraulic valve arrangement41US 5,868,059 ACaterpillar Inc. · 1999
- Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve41US 7,487,707 B2HUSCO International, Inc. · 2009