F15B 2211/355
Pilot pressure control
F15B2211/355 (Pilot pressure control) appears on 286 US grants and 257 published applications in this corpus.
Search patents in F15B- Granted patents
- 286
- Published applications
- 257
- Assignees
- 130
- Inventors
- 589
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 3 |
| 2003 | 6 | 7 |
| 2004 | 5 | 6 |
| 2005 | 3 | 2 |
| 2006 | 2 | 1 |
| 2007 | 2 | 5 |
| 2008 | 1 | 3 |
| 2009 | 5 | 5 |
| 2010 | 2 | 5 |
| 2011 | 1 | 3 |
| 2012 | 3 | 5 |
| 2013 | 2 | 6 |
| 2014 | 6 | 7 |
| 2015 | 4 | 14 |
| 2016 | 10 | 12 |
| 2017 | 10 | 9 |
| 2018 | 5 | 15 |
| 2019 | 20 | 18 |
| 2020 | 18 | 25 |
| 2021 | 21 | 22 |
| 2022 | 23 | 25 |
| 2023 | 22 | 20 |
| 2024 | 23 | 17 |
| 2025 | 15 | 14 |
| 2026 | 10 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic system for work machine, and work machine15 Sep 2026US RE51,031 E1Kubota Corporation
- Gas circuit control system of pneumatic cardiopulmonary resuscitation pressing device5 May 2026US 12,616,638 B2Sunlife Science (Suzhou) Inc.
- Three servovalve thrust reverser actuator system7 Apr 2026US 12,595,774 B2Woodward, Inc.
- Work machine3 Mar 2026US 12,565,760 B2Hitachi Construction Machinery Co., Ltd.
- Manifold system for 2003 configuration17 Feb 2026US 12,553,454 B2Rotex Automation Limited
- Transport vehicle20 Aug 2026US 2026/0241846 A1Hitachi Construction Machinery Co., Ltd.
- Work Machine13 Aug 2026US 2026/0234907 A1Hitachi Construction Machinery Co., Ltd.
- Three servovalve thrust reverser actuator system23 Jul 2026US 2026/0210311 A1
- Bulldozing hydraulic system with bulldozing blade floating function and excavator11 Jun 2026US 2026/0160045 A1Xuzhou XCMG Excavator Machinery Co., Ltd.
- Work machine5 Mar 2026US 2026/0062885 A1Hitachi Construction Machinery Co., Ltd.
Most cited
By later US patents
- Hydraulic circuit and control system therefor115US 5,138,838 ACaterpillar Inc. · 1992
- Hydraulic system for supplying hydraulic fluid to a hydraulically operated device alternately at pressures of different value71US 4,142,368 AWelko Industriale S.p.A. · 1979
- Control valve system for blowout preventers58US 4,509,405 ANL Industries, Inc. · 1985
- Pressure regulator for hydraulically controlled machine tools47US 4,796,652 AIndex-Werke Komm.-Ges. Hahn & Tessky · 1989
- Fluid control system for power shovel46US 5,083,428 AKabushiki Kaisha Kobe Seiko Sho · 1992