F16F 2228/066
Variable stiffness
F16F2228/066 (Variable stiffness) appears on 560 US grants and 759 published applications in this corpus.
Search patents in F16F- Granted patents
- 560
- Published applications
- 759
- Assignees
- 295
- Inventors
- 1,265
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 2 | 2 |
| 2011 | 0 | 3 |
| 2012 | 0 | 3 |
| 2013 | 1 | 1 |
| 2014 | 4 | 4 |
| 2015 | 4 | 14 |
| 2016 | 10 | 28 |
| 2017 | 18 | 40 |
| 2018 | 25 | 65 |
| 2019 | 53 | 86 |
| 2020 | 75 | 92 |
| 2021 | 50 | 94 |
| 2022 | 69 | 67 |
| 2023 | 71 | 93 |
| 2024 | 74 | 60 |
| 2025 | 54 | 59 |
| 2026 | 46 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Active crew seat vibration control6 Oct 2026US 12,753,823 B2Lockheed Martin Corporation
- Controlled damper with proportional valve and cross-flow bypass sleeve29 Sep 2026US 12,747,769 B2Beijingwest Industries Co., Ltd.
- Systems for damping a solar photovoltaic array tracker22 Sep 2026US 12,744,492 B2FTC Solar, Inc.
- End-stop control valves for providing progessive damping forces in vibration dampers15 Sep 2026US 12,736,103 B2thyssenkrupp AG
- Hydraulic devices including coated surfaces25 Aug 2026US 12,716,119 B2Maxterial, Inc.
- Vibration damper, motor vehicle and method for filling8 Oct 2026US 2026/0309202 A1thyssenkrupp AG
- Telescopic Tube Assembly with Idle Stroke and Integrated Damper8 Oct 2026US 2026/0309205 A1
- Shock-absorber cylinder having an adjustable length and/or shock-absorbing effect1 Oct 2026US 2026/0298306 A1Airbus Operations GmbH
- Integrated Semi Active Valve Seat Plate24 Sep 2026US 2026/0287038 A1
- Shock absorbing device and suspension device17 Sep 2026US 2026/0276053 A1Astemo, Ltd.
Most cited
By later US patents
- Suspension damper with remotely-operable valve147US 9,239,090 B2Fox Factory, Inc. · 2016
- Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring139US 7,703,585 B2Fox Factory, Inc. · 2010
- Methods and apparatus for controlling a fluid damper108US 8,955,653 B2Fox Factory, Inc. · 2015
- Cooler for a suspension damper93US 8,763,770 B2Fox Factory, Inc. · 2014
- Suspension damper with by-pass valves87US 9,556,925 B2Fox Factory, Inc. · 2017