F01L 1/24
By fluid means
Official title: by fluid means, e.g. hydraulically
F01L1/24 (By fluid means) appears on 1,414 US grants and 1,111 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,414
- Published applications
- 1,111
- Assignees
- 250
- Inventors
- 1,704
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 11 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 14 | 0 |
| 1984 | 20 | 0 |
| 1985 | 21 | 0 |
| 1986 | 21 | 0 |
| 1987 | 29 | 0 |
| 1988 | 24 | 0 |
| 1989 | 29 | 0 |
| 1990 | 12 | 0 |
| 1991 | 14 | 0 |
| 1992 | 19 | 0 |
| 1993 | 17 | 0 |
| 1994 | 16 | 0 |
| 1995 | 11 | 0 |
| 1996 | 12 | 0 |
| 1997 | 24 | 0 |
| 1998 | 17 | 0 |
| 1999 | 30 | 0 |
| 2000 | 18 | 0 |
| 2001 | 18 | 12 |
| 2002 | 25 | 27 |
| 2003 | 44 | 24 |
| 2004 | 18 | 23 |
| 2005 | 22 | 42 |
| 2006 | 45 | 60 |
| 2007 | 43 | 65 |
| 2008 | 43 | 50 |
| 2009 | 28 | 76 |
| 2010 | 38 | 44 |
| 2011 | 49 | 52 |
| 2012 | 45 | 28 |
| 2013 | 35 | 32 |
| 2014 | 39 | 32 |
| 2015 | 32 | 43 |
| 2016 | 35 | 80 |
| 2017 | 51 | 72 |
| 2018 | 67 | 75 |
| 2019 | 76 | 62 |
| 2020 | 89 | 64 |
| 2021 | 57 | 44 |
| 2022 | 41 | 30 |
| 2023 | 29 | 19 |
| 2024 | 26 | 25 |
| 2025 | 21 | 24 |
| 2026 | 12 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01L 1/2405By means of a hydraulic adjusting device located between the cylinder head607
- F01L 1/245Hydraulic tappets420
- F01L 1/2411By means of a hydraulic adjusting device located between the valve stem191
- F01L 1/2416By means of a hydraulic adjusting device attached to an articulated rocker108
- F01L 2001/2444Details relating to the hydraulic feeding circuitIndexing code99
- F01L 1/2422By means or a hydraulic adjusting device located between the push rod73
- F01L 2001/2427By means of an hydraulic adjusting device located between cam and pushIndexing code51
- F01L 2001/2433Self containedIndexing code25
All 9 subgroupsShow fewer
Recent patents
- Variable displacement valvetrain systems with rocker shaft porting and insert sleeves for engine cylinder deactivation22 Sep 2026US 12,742,403 B2GM Global Technology Operations LLC
- Hydraulic capsule for variable valve actuation4 Aug 2026US 12,698,732 B2Eaton Intelligent Power Limited
- Compliance spring mounting method and assembly26 May 2026US 12,637,965 B2Eaton Intelligent Power Limited
- Self-contained compression brake control module for integrated rocker arm engine braking and methods28 Apr 2026US 12,612,869 B2Pacbrake Company
- Rocker arm assembly7 Apr 2026US 12,595,753 B2Eaton Intelligent Power Limited
- Roller hydraulic valve lifter bearing10 Sep 2026US 2026/0266204 A1Roller Bearing Company of America, Inc.
- Variable valve timing mechanism23 Jul 2026US 2026/0210276 A1Subaru Corporation
- Oil pan for internal combustion engine9 Jul 2026US 2026/0194004 A1Arctic Cat Inc.
- Cylinder head structure for internal combustion engine25 Jun 2026US 2026/0176988 A1
- Bridgeless, single output, coupled hydraulic rocker arm26 Mar 2026US 2026/0085625 A1
Most cited
By later US patents
- Engine valve control mechanism88US 4,203,397 AEaton Corporation · 1980
- 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
- Arrangement for electromagnetically operated actuators68US 4,515,343 AFev Forschungsgesellschaft fur Energietechnik und ver Brennungsmotoren mbH · 1985
- Valve control system67US 5,660,153 AEaton Corporation · 1997