F15B 2211/67
Methods for controlling pilot pressure
F15B2211/67 (Methods for controlling pilot pressure) appears on 218 US grants and 167 published applications in this corpus.
Search patents in F15B- Granted patents
- 218
- Published applications
- 167
- Assignees
- 99
- Inventors
- 452
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 2 | 4 |
| 2014 | 1 | 2 |
| 2015 | 3 | 9 |
| 2016 | 6 | 12 |
| 2017 | 5 | 7 |
| 2018 | 4 | 10 |
| 2019 | 14 | 13 |
| 2020 | 12 | 16 |
| 2021 | 18 | 16 |
| 2022 | 16 | 29 |
| 2023 | 21 | 12 |
| 2024 | 13 | 13 |
| 2025 | 16 | 8 |
| 2026 | 6 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Work machine3 Mar 2026US 12,565,760 B2Hitachi Construction Machinery Co., Ltd.
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- Floating control system for fixed displacement pump system24 Feb 2026US 12,560,183 B2Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Directional control valve device30 Oct 2025US 2025/0334190 A1Nabtesco Corporation
- System and method for controlling hydraulic fluid flow within a work vehicle9 Oct 2025US 2025/0314046 A1CNH Industrial America LLC
- Wing force management system for an agricultural implement14 Aug 2025US 2025/0255209 A1CNH Industrial America LLC
- Hydraulic system in work machine17 Jul 2025US 2025/0230634 A1Kubota Corporation
- Fluid circuit1 May 2025US 2025/0137468 A1Eagle Industry Co., Ltd.
Most cited
By later US patents
- Fluid control system for power shovel46US 5,083,428 AKabushiki Kaisha Kobe Seiko Sho · 1992
- Control apparatus for a plurality of simultaneously actuatable fluid motors32US 4,165,613 AKoehring Company · 1979
- Hydraulic circuitry for an excavator30US 4,030,623 ACaterpillar Tractor Co. · 1977
- Construction machinery30US 6,851,207 B2Kobelco Construction Machinery Co., Ltd. · 2005
- Hydraulic system for controlling a gang of lawn mowers28US 3,992,858 AJacobsen Manufacturing Company · 1976