F01L 2009/4086
Soft landing
Official title: {Soft landing, e.g. applying braking current; Levitation of armature close to core surface}
F01L2009/4086 (Soft landing) appears on 28 US grants and 25 published applications in this corpus.
Search patents in F01L- Granted patents
- 28
- Published applications
- 25
- Assignees
- 19
- Inventors
- 49
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 3 |
| 2002 | 3 | 4 |
| 2003 | 3 | 2 |
| 2004 | 1 | 1 |
| 2005 | 2 | 0 |
| 2006 | 2 | 5 |
| 2007 | 2 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 3 |
| 2010 | 2 | 1 |
| 2011 | 2 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 2 |
| 2022 | 2 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydraulic valve actuation system with controlled valve seating velocity and method therefor2 Sep 2025US 12,404,787 B2ARA4 Consulting LLC
- Fully variable electro-hydraulic valve system having buffering function17 Oct 2023US 11,788,441 B2Weifang Lichuang Electronic Technology Co., Ltd
- Method and device for electrically controlling a valve actuator in an internal combustion engine22 Feb 2022US 11,255,228 B2Hedman Ericsson Patent AB
- Electrically activated valve actuator for an internal combustion engine15 Feb 2022US 11,248,503 B2Hedman Ericsson Patent AB
- Method and device for controlling a valve with several lift phases, and method for supplying a thermal engine with oxidant25 Sep 2012US 8,275,537 B2Valeo Systemes de Controle Moteur
- Hydraulic Valve Actuation System with Controlled Valve Seating Velocity and Method Therefor8 Aug 2024US 2024/0263573 A1ARA4 Consulting LLC
- Fully variable electro-hydraulic valve system having buffering function5 Jan 2023US 2023/0003145 A1Weifang Lichuang Electronic Technology Co., Ltd
- Method and device for electrically controlling a valve actuator in an internal combustion engine18 Nov 2021US 2021/0355848 A1Hedman Ericsson Patent AB
- Electrically activated valve actuator for an internal combustion engine12 Aug 2021US 2021/0246814 A1Hedman Ericsson Patent AB
- Variable throttle device24 Jul 2014US 2014/0202424 A1Jiangsu Gongda Power Technologies Co., Ltd.
Most cited
By later US patents
- System and method for servo control of nonlinear electromagnetic actuators139US 6,208,497 B1Venture Scientifics, LLC · 2001
- System for control of an electromagnetic actuator42US 6,249,418 B12001
- Solenoid cassette pump with servo controlled volume detection36US 6,942,469 B2Crystal Investments, Inc. · 2005
- Control system for two opposed solenoid-type electromagnetic valve31US 5,671,705 AHonda Giken Kogyo K.K. (Honda Motor Co., Ltd. in English) · 1997
- Electromagnetic actuator having magnetic impact-damping means18US 6,066,999 AFEV Motorentechnik GmbH · 2000