F01L 2001/3445
Details relating to the hydraulic means for changing the angular relationship
Official title: {Details relating to the hydraulic means for changing the angular relationship}
F01L2001/3445 (Details relating to the hydraulic means for changing the angular relationship) appears on 1,122 US grants and 1,180 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,122
- Published applications
- 1,180
- Assignees
- 143
- Inventors
- 1,085
- Latest grant
- 30 Jun 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 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 14 | 0 |
| 2001 | 20 | 17 |
| 2002 | 39 | 35 |
| 2003 | 29 | 38 |
| 2004 | 41 | 29 |
| 2005 | 32 | 48 |
| 2006 | 29 | 38 |
| 2007 | 35 | 45 |
| 2008 | 26 | 38 |
| 2009 | 30 | 48 |
| 2010 | 24 | 58 |
| 2011 | 28 | 65 |
| 2012 | 46 | 63 |
| 2013 | 52 | 78 |
| 2014 | 92 | 71 |
| 2015 | 83 | 70 |
| 2016 | 60 | 87 |
| 2017 | 58 | 95 |
| 2018 | 90 | 57 |
| 2019 | 71 | 55 |
| 2020 | 69 | 52 |
| 2021 | 46 | 31 |
| 2022 | 20 | 26 |
| 2023 | 19 | 13 |
| 2024 | 25 | 12 |
| 2025 | 9 | 5 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve opening-closing timing control device30 Jun 2026US 12,669,072 B2Aisin Corporation
- Oil passage control valve and valve timing varying device10 Feb 2026US 12,546,239 B2Mikuni Corporation
- Camshaft adjustment system for flexibly starting an internal combustion engine, and method for operating a drivetrain27 Jan 2026US 12,535,019 B2Schaeffler Technologies AG & Co. KG
- Variable cam timing phaser and system including the same23 Sep 2025US 12,421,877 B2BorgWarner Inc.
- Fluid control valve unit and valve timing change device9 Sep 2025US 12,410,733 B2Mikuni Corporation
- Vane seal spring8 Oct 2026US 2026/0309060 A1
- Variable cam timing phaser and method of assembling the same8 Oct 2026US 2026/0309062 A1
- Hydraulic camshaft phaser for variable valve control of a combustion engine and method for operating a hydraulic camshaft phaser13 Aug 2026US 2026/0235054 A1Schaeffler Technologies AG & Co. KG
- Hydraulic control valve and method of controlling a hybrid cam phaser30 Jul 2026US 2026/0218632 A1
- Variable valve timing mechanism23 Jul 2026US 2026/0210276 A1Subaru Corporation
Most cited
By later US patents
- Device for adjusting an angular phase difference between two elements100US 4,858,572 AAisin Seiki Kabushiki Kaisha · 1989
- System for regulating valve timing of internal combustion engine93US 5,924,395 AToyota Jidosha Kabushiki Kaisha · 1999
- Variable valve timing control system80US 6,330,870 B1Denso Corporation · 2001
- Variable valve timing mechanism for internal combustion engine62US 5,738,056 AToyota Jidosha Kabushiki Kaisha · 1998
- Method for effectively diagnosing the operational state of a variable valve lift device47US 7,063,057 B1Delphi Technologies, Inc. · 2006