F01L 2001/34423
Details relating to the hydraulic feeding circuit
Official title: {Details relating to the hydraulic feeding circuit}
F01L2001/34423 (Details relating to the hydraulic feeding circuit) appears on 1,433 US grants and 1,377 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,433
- Published applications
- 1,377
- Assignees
- 218
- Inventors
- 1,664
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 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 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 14 | 0 |
| 1993 | 13 | 0 |
| 1994 | 9 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 20 | 0 |
| 1999 | 15 | 0 |
| 2000 | 20 | 0 |
| 2001 | 42 | 17 |
| 2002 | 33 | 47 |
| 2003 | 44 | 65 |
| 2004 | 62 | 54 |
| 2005 | 57 | 62 |
| 2006 | 50 | 49 |
| 2007 | 43 | 57 |
| 2008 | 41 | 73 |
| 2009 | 34 | 69 |
| 2010 | 37 | 73 |
| 2011 | 48 | 62 |
| 2012 | 65 | 58 |
| 2013 | 52 | 74 |
| 2014 | 90 | 54 |
| 2015 | 68 | 70 |
| 2016 | 53 | 88 |
| 2017 | 67 | 97 |
| 2018 | 89 | 80 |
| 2019 | 87 | 62 |
| 2020 | 65 | 59 |
| 2021 | 64 | 38 |
| 2022 | 31 | 29 |
| 2023 | 25 | 18 |
| 2024 | 26 | 8 |
| 2025 | 12 | 8 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Control device for hydraulic control valve28 Apr 2026US 12,612,912 B2Hitachi Astemo, Ltd.
- Variable valve timing system24 Feb 2026US 12,560,109 B2Suzuki Motor 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
- Control valve assembly of a variable cam timing phaser6 Jan 2026US 12,516,615 B2Borg-Warner Corporation
- Variable cam timing phaser8 Oct 2026US 2026/0309061 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
- Variable camshaft timing for internal combustion engine95US 5,107,804 ABorg-Warner Automotive Transmission & Engine Components Corporation · 1992
- Variable camshaft timing for internal combustion engine93US 5,002,023 ABorg-Warner Automotive, Inc. · 1991
- System for regulating valve timing of internal combustion engine93US 5,924,395 AToyota Jidosha Kabushiki Kaisha · 1999
- Dual-acting apparatus for variable valve timing and the like87US 5,417,186 AClemson University · 1995