F15B 2211/5157
Being connected to a pressure source and a return line
Official title: being connected to a pressure source and a return line
F15B2211/5157 (Being connected to a pressure source and a return line) appears on 168 US grants and 147 published applications in this corpus.
Search patents in F15B- Granted patents
- 168
- Published applications
- 147
- Assignees
- 128
- Inventors
- 439
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 1 |
| 2003 | 2 | 3 |
| 2004 | 2 | 2 |
| 2005 | 3 | 6 |
| 2006 | 0 | 3 |
| 2007 | 2 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 4 |
| 2012 | 0 | 1 |
| 2013 | 2 | 1 |
| 2014 | 4 | 2 |
| 2015 | 1 | 7 |
| 2016 | 1 | 6 |
| 2017 | 3 | 6 |
| 2018 | 5 | 11 |
| 2019 | 8 | 3 |
| 2020 | 15 | 13 |
| 2021 | 11 | 8 |
| 2022 | 7 | 21 |
| 2023 | 11 | 9 |
| 2024 | 14 | 12 |
| 2025 | 13 | 16 |
| 2026 | 9 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Drive control device for rotating work machine and rotating work machine provided with same16 Jun 2026US 12,655,607 B2Kobelco Construction Machinery Co., Ltd.
- Electro-hydraulic actuator with a pilot-actuated float mode16 Jun 2026US 12,655,918 B2Parker-Hannifin Corporation
- Hydraulic machine swing system with anti-drift9 Jun 2026US 12,650,003 B2Caterpillar Inc.
- Volume follow supply9 Jun 2026US 12,650,135 B2Hydac Fluidtechnik GmbH
- Load dampening system13 Aug 2026US 2026/0235142 A1J. C. Bamford Excavators Limited
- Hydraulic System having an Inertia Charging Arrangement25 Jun 2026US 2026/0177086 A1Robert Bosch GmbH
- Electro-Hydraulic Actuator Assembly with a Fluid Access Port11 Jun 2026US 2026/0160279 A1Parker-Hannifin Corporation
- Linear actuator assembly and system21 May 2026US 2026/0139694 A1Project Phoenix, LLC
- Oil circuit system, lifting device, electric jack, press, crane, and tire mounting/dismounting and transport apparatus12 Mar 2026US 2026/0070764 A1Snit Hydraulic Co., Ltd.
Most cited
By later US patents
- Load sensing hydraulic control system for variable displacement pump44US 6,216,456 B1Caterpillar Inc. · 2001
- Hydraulic drive system for construction machines26US 5,134,853 AHitachi Construction Machinery Co., Ltd. · 1992
- Hydraulic control valve system with split pressure compensator26US 5,791,142 AHUSCO International, Inc. · 1998
- Overload preventive device23US 5,787,926 AKomatsu Industries Corporation · 1998
- Two-stage pressure relief valve22US 7,165,950 B2Bell Helicopter Textron Inc. · 2007