F15B 2211/6316
The pressure being a pilot pressure
Official title: the pressure being a pilot pressure
F15B2211/6316 (The pressure being a pilot pressure) appears on 221 US grants and 223 published applications in this corpus.
Search patents in F15B- Granted patents
- 221
- Published applications
- 223
- Assignees
- 64
- Inventors
- 410
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 4 |
| 2003 | 3 | 5 |
| 2004 | 4 | 1 |
| 2005 | 2 | 3 |
| 2006 | 2 | 3 |
| 2007 | 1 | 3 |
| 2008 | 3 | 1 |
| 2009 | 2 | 4 |
| 2010 | 0 | 8 |
| 2011 | 2 | 3 |
| 2012 | 2 | 5 |
| 2013 | 8 | 7 |
| 2014 | 8 | 13 |
| 2015 | 8 | 16 |
| 2016 | 11 | 15 |
| 2017 | 13 | 14 |
| 2018 | 11 | 19 |
| 2019 | 26 | 15 |
| 2020 | 16 | 20 |
| 2021 | 22 | 20 |
| 2022 | 15 | 13 |
| 2023 | 11 | 10 |
| 2024 | 12 | 9 |
| 2025 | 12 | 8 |
| 2026 | 5 | 3 |
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
- Protection for a circuit for controlling the orientation of propeller blades of an aircraft engine7 Jul 2026US 12,674,475 B2Safran Aircraft Engines
- Work machine24 Feb 2026US 12,559,910 B2Hitachi Construction Machinery Co., Ltd.
- Calibration system in hydraulic system3 Feb 2026US 12,540,634 B2Caterpillar SARL
- Energy recovery system and control strategy for hydraulic excavator boom20 Jan 2026US 12,529,391 B1Central South University of Forestry and Technology
- Transport vehicle20 Aug 2026US 2026/0241846 A1Hitachi Construction Machinery Co., Ltd.
- Construction machine22 Jan 2026US 2026/0022533 A1Hitachi Construction Machinery Co., Ltd.
- Protection for a circuit for controlling the orientation of propeller blades of an aircraft engine15 Jan 2026US 2026/0016026 A1Safran Aircraft Engines
- Directional control valve device30 Oct 2025US 2025/0334190 A1Nabtesco Corporation
- Working machine and method of controlling working machine11 Sep 2025US 2025/0283303 A1Kubota Corporation
Most cited
By later US patents
- Hydraulic control circuit in a hydraulic excavator52US 5,970,709 AKabushiki Kaisha Kobe Seiko Sho · 1999
- Control device for hydraulically-operated equipment42US 6,308,516 B1Komatsu Ltd. · 2001
- Hydraulic system with a dynamic seal32US 9,651,067 B2Caterpillar Inc. · 2017
- Construction machinery30US 6,851,207 B2Kobelco Construction Machinery Co., Ltd. · 2005
- Hydraulic control system for working machine27US 7,392,653 B2Kobelco Construction Machinery Co., Ltd. · 2008