F15B 13/0435
The pilot valves being sliding valves
Official title: {the pilot valves being sliding valves}
F15B13/0435 (The pilot valves being sliding valves) appears on 120 US grants and 84 published applications in this corpus.
Search patents in F15B- Granted patents
- 120
- Published applications
- 84
- Assignees
- 72
- Inventors
- 197
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 4 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 2 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 0 |
| 2010 | 2 | 2 |
| 2011 | 1 | 1 |
| 2012 | 1 | 3 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 2 | 1 |
| 2016 | 2 | 3 |
| 2017 | 4 | 8 |
| 2018 | 5 | 2 |
| 2019 | 4 | 9 |
| 2020 | 12 | 13 |
| 2021 | 12 | 10 |
| 2022 | 9 | 3 |
| 2023 | 5 | 6 |
| 2024 | 7 | 2 |
| 2025 | 1 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Direct drive valve21 Jul 2026US 12,687,239 B2Microtecnica S.R.L.
- Hydraulic control system and method with electro-proportional pressure valve and integral check5 May 2026US 12,618,424 B2HydraForce, Inc.
- Compact hydraulically centered three-way transfer valve7 Apr 2026US 12,595,854 B2Hamilton Sundstrand Corporation
- Servovalve4 Nov 2025US 12,460,739 B2Hamilton Sundstrand Corporation
- Fixed displacement hydraulic pump match flow demand control system31 Dec 2024US 12,180,983 B2TEAM Industries, Inc.
- Hydraulic actuator6 Aug 2026US 2026/0226922 A1Svm Schultz Verwaltungs-GmbH & Co.KG
- Compact hydraulically centered three-way transfer valve19 Mar 2026US 2026/0078828 A1Hamilton Sundstrand Corporation
- Direct drive valve20 Mar 2025US 2025/0092960 A1Microtecnica S.R.L.
- Fixed displacement hydraulic pump match flow demand control system13 Mar 2025US 2025/0084874 A1TEAM Industries, Inc.
- Hydraulic control system and method with electro-proportional pressure valve and integral check1 Aug 2024US 2024/0255008 A1HydraForce, Inc.
Most cited
By later US patents
- Pilot-operated valve with load pressure feedback48US 4,741,364 ADeere & Company · 1988
- Pilot valves for two-stage hydraulic devices47US 4,615,358 AVickers, Incorporated · 1986
- Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve41US 7,487,707 B2HUSCO International, Inc. · 2009
- Electro-hydraulic proportional control servo valve39US 4,201,116 ACessna Aircraft Company · 1980
- Poppet valve with force feedback control38US 5,421,545 ACaterpillar Inc. · 1995