F16F 9/3481
Characterised by shape or construction of throttling passages in piston
Official title: {characterised by shape or construction of throttling passages in piston (F16F9/344 takes precedence)}
F16F9/3481 (Characterised by shape or construction of throttling passages in piston) appears on 67 US grants and 90 published applications in this corpus.
Search patents in F16F- Granted patents
- 67
- Published applications
- 90
- Assignees
- 38
- Inventors
- 139
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 2 | 2 |
| 2013 | 0 | 4 |
| 2014 | 1 | 3 |
| 2015 | 3 | 5 |
| 2016 | 2 | 4 |
| 2017 | 5 | 9 |
| 2018 | 6 | 9 |
| 2019 | 7 | 6 |
| 2020 | 7 | 7 |
| 2021 | 3 | 6 |
| 2022 | 8 | 4 |
| 2023 | 6 | 5 |
| 2024 | 3 | 8 |
| 2025 | 1 | 4 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Controlled damper with proportional valve and cross-flow bypass sleeve29 Sep 2026US 12,747,769 B2Beijingwest Industries Co., Ltd.
- Shock absorber14 Apr 2026US 12,601,385 B2Hitachi Astemo, Ltd.
- Shock absorber17 Feb 2026US 12,553,491 B2Hitachi Astemo, Ltd.
- Damper assembly18 Mar 2025US 12,253,138 B2
- Shock absorber31 Dec 2024US 12,181,018 B2Hitachi Astemo, Ltd.
- Progressive end-stop control valves for vibration dampers30 Jul 2026US 2026/0218772 A1thyssenkrupp AG
- Reservoir shock absorber16 Jul 2026US 2026/0201936 A1
- Hydro-pneumatic spring device capable of regulating damping force21 May 2026US 2026/0139723 A1Ningbo Dingqu Automotive Technology Co., Ltd.
- Damper valve and hydraulic damper using the same21 May 2026US 2026/0139724 A1Ningbo Dingqu Automotive Technology Co., Ltd.
- Cylinder device16 Apr 2026US 2026/0104082 A1Astemo, Ltd.
Most cited
By later US patents
- Vehicle height adjustment suspension device128US 8,262,100 B22012
- Fluid flow regulation of a vehicle shock absorber/damper125US 7,628,259 B2ThyssenKrupp Bilstein of America Inc. · 2009
- Piston assembly of shock absorber80US 8,752,682 B2Mando Corporation · 2014
- Junction bleed72US 8,069,964 B2Tenneco Automotive Operating Company Inc. · 2011
- Method and apparatus for an adjustable damper63US 10,330,171 B2Fox Factory, Inc. · 2019