F01L 2001/34446
Fluid accumulators for the feeding circuit
Official title: {Fluid accumulators for the feeding circuit}
F01L2001/34446 (Fluid accumulators for the feeding circuit) appears on 273 US grants and 226 published applications in this corpus.
Search patents in F01L- Granted patents
- 273
- Published applications
- 226
- Assignees
- 78
- Inventors
- 388
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 4 |
| 2002 | 2 | 11 |
| 2003 | 11 | 19 |
| 2004 | 16 | 15 |
| 2005 | 14 | 14 |
| 2006 | 17 | 14 |
| 2007 | 14 | 10 |
| 2008 | 6 | 7 |
| 2009 | 8 | 19 |
| 2010 | 7 | 18 |
| 2011 | 14 | 10 |
| 2012 | 14 | 13 |
| 2013 | 5 | 17 |
| 2014 | 24 | 7 |
| 2015 | 12 | 4 |
| 2016 | 1 | 13 |
| 2017 | 3 | 3 |
| 2018 | 11 | 9 |
| 2019 | 7 | 7 |
| 2020 | 5 | 5 |
| 2021 | 7 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 1 |
| 2024 | 3 | 2 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Variable cam timing phaser and system including the same23 Sep 2025US 12,421,877 B2BorgWarner Inc.
- Camshaft phaser having non-return valves1 Apr 2025US 12,264,603 B2Schaeffler Technologies AG & Co. KG
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other11 Mar 2025US 12,247,502 B2C. R. F. Societa Consortile per Azioni
- Camshaft adjuster24 Sep 2024US 12,098,662 B2Schaeffler Technologies AG & Co. KG
- Bypass oil supply for an oil volume accumulator of a hydraulic camshaft phaser6 Aug 2024US 12,055,073 B2Schaeffler Technologies AG & Co. KG
- Camshaft phaser having non-return valves23 Jan 2025US 2025/0027432 A1Schaeffler Technologies AG & Co. KG
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other16 Jan 2025US 2025/0020072 A1C. R. F. Societa Consortile per Azioni
- Variable cam timing phaser and system including the same8 Aug 2024US 2024/0263570 A1BorgWarner Inc.
- Bypass oil supply for an oil volume accumulator of a hydraulic camshaft phaser25 Jan 2024US 2024/0026804 A1Schaeffler Technologies AG & Co. KG
- Variable cam timing phaser and system including the same12 Jan 2023US 2023/0008355 A1BorgWarner Inc.
Most cited
By later US patents
- Internal combustion engines with combined cam and electro-hydraulic engine valve control86US 5,680,841 ADiesel Engine Retarders, Inc. · 1997
- System and method for controlling the amount of lost motion between an engine valve and a valve actuation means83US 5,829,397 ADiesel Engine Retarders, Inc. · 1998
- Multi-cylinder diesel engine with variable valve actuation74US 6,237,551 B1C. R. F. Societa Consortile per Azioni · 2001
- Four-cycle internal combustion engines with two-cycle compression release braking69US 5,537,976 ADiesel Engine Retarders, Inc. · 1996
- Valve operation stopping means for multi-cylinder engine55US 4,576,128 AHonda Giken Kogyo Kabushiki Kaisha · 1986