F01L 9/21
Actuated by solenoids
Official title: actuated by solenoids
F01L9/21 (Actuated by solenoids) appears on 265 US grants and 279 published applications in this corpus.
Search patents in F01L- Granted patents
- 265
- Published applications
- 279
- Assignees
- 109
- Inventors
- 490
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 10 | 7 |
| 2002 | 9 | 17 |
| 2003 | 16 | 16 |
| 2004 | 18 | 20 |
| 2005 | 14 | 32 |
| 2006 | 26 | 25 |
| 2007 | 22 | 34 |
| 2008 | 22 | 16 |
| 2009 | 12 | 14 |
| 2010 | 8 | 5 |
| 2011 | 11 | 2 |
| 2012 | 4 | 6 |
| 2013 | 4 | 5 |
| 2014 | 1 | 4 |
| 2015 | 5 | 5 |
| 2016 | 3 | 11 |
| 2017 | 8 | 9 |
| 2018 | 10 | 7 |
| 2019 | 5 | 7 |
| 2020 | 7 | 9 |
| 2021 | 7 | 13 |
| 2022 | 7 | 3 |
| 2023 | 6 | 7 |
| 2024 | 3 | 1 |
| 2025 | 4 | 4 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01L 2009/2132Biasing meansIndexing code93
- F01L 2009/2105Comprising two or more coilsIndexing code86
- F01L 2009/2167Sensing meansIndexing code56
- F01L 2009/2146Latching meansIndexing code42
- F01L 2009/2125Shaft and armature constructionIndexing code34
- F01L 2009/2103Comprising one coilIndexing code21
- F01L 2009/2151Damping meansIndexing code16
- F01L 2009/213Casing constructionIndexing code8
All 17 subgroupsShow fewer
- F01L 2009/2161WiringIndexing code7
- F01L 2009/2115Moving coil actuatorsIndexing code6
- F01L 2009/2128Core and coil constructionIndexing code6
- F01L 2009/2155Lash adjusting meansIndexing code2
- F01L 2009/2157Actuator cooling meansIndexing code2
- F01L 2009/2159Means for facilitating assemblyIndexing code2
- F01L 2009/2117Floating actuators for varying the valve strokeIndexing code0
- F01L 2009/2149Means for varying the air gapIndexing code0
- F01L 2009/2153Means for counteracting cylinder pressureIndexing code0
Recent patents
- Camless reciprocating engine control system10 Mar 2026US 12,571,356 B2Adaptive Camless Technology, LLC
- Fast-acting toggling armature uses centring spring9 Dec 2025US 12,494,312 B2Cheesecake Energy Ltd.
- Engine brake system for an internal combustion engine2 Dec 2025US 12,486,807 B1GM Global Technology Operations LLC
- Clunk and shuffle management in multi-motor, multi-axle electrified drivetrains10 Jun 2025US 12,325,310 B2Ford Global Technologies, LLC
- Electro-hydrostatic actuator20 May 2025US 12,305,671 B2G. W. Lisk Company, Inc.
- Engine brake system for an internal combustion engine4 Dec 2025US 2025/0369398 A1GM Global Technology Operations LLC
- Electro-hydrostatic actuator4 Sep 2025US 2025/0277496 A1G. W. Lisk Company, Inc.
- Clunk and shuffle management in multi-motor, multi-axle electrified drivetrains28 Aug 2025US 2025/0269739 A1Ford Global Technologies, LLC
- Camless reciprocating engine control system20 Feb 2025US 2025/0059925 A1Adaptive Camless Technology, LLC
- Deactivating Valvetrain Assembly14 Mar 2024US 2024/0084723 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- System and method for servo control of nonlinear electromagnetic actuators139US 6,208,497 B1Venture Scientifics, LLC · 2001
- Variable lift operation of bistable electromechanical poppet valve actuator104US 4,829,947 AGeneral Motors Corporation · 1989
- Arrangement for electromagnetically operated actuators68US 4,515,343 AFev Forschungsgesellschaft fur Energietechnik und ver Brennungsmotoren mbH · 1985
- Engine valve disabler63US 6,260,525 B12001
- Method and apparatus for controlling the cylinder torque of a combustion engine having electromagnetically driven valves59US 6,546,910 B2Toyota Jidosha Kabushiki Kaisha · 2003