F16F 9/348
Throttling passages in the form of annular discs or other plate-like elements
Official title: Throttling passages in the form of annular discs {or other plate-like elements which may or may not have a spring action}, operating in opposite directions {or singly, e.g. annular discs positioned on top of the valve or piston body (F16F9/341, F16F9/3415 take precedence)}
F16F9/348 (Throttling passages in the form of annular discs or other plate-like elements) appears on 660 US grants and 689 published applications in this corpus.
Search patents in F16F- Granted patents
- 660
- Published applications
- 689
- Assignees
- 190
- Inventors
- 945
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 10 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 9 | 0 |
| 1990 | 7 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 13 | 0 |
| 1999 | 14 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 7 |
| 2002 | 22 | 17 |
| 2003 | 11 | 14 |
| 2004 | 10 | 11 |
| 2005 | 11 | 25 |
| 2006 | 12 | 13 |
| 2007 | 8 | 5 |
| 2008 | 6 | 16 |
| 2009 | 3 | 22 |
| 2010 | 8 | 9 |
| 2011 | 8 | 14 |
| 2012 | 9 | 16 |
| 2013 | 14 | 22 |
| 2014 | 18 | 27 |
| 2015 | 33 | 44 |
| 2016 | 29 | 40 |
| 2017 | 36 | 39 |
| 2018 | 30 | 42 |
| 2019 | 36 | 42 |
| 2020 | 36 | 41 |
| 2021 | 32 | 37 |
| 2022 | 25 | 34 |
| 2023 | 36 | 42 |
| 2024 | 28 | 59 |
| 2025 | 24 | 24 |
| 2026 | 30 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16F 9/3485Characterised by features of supporting elements intended to guide or limit the190
- F16F 9/3484Characterised by features of the annular discs per se, singularly or in153
- F16F 9/3482The annular discs being incorporated within the valve or piston body98
- F16F 9/3488Characterised by features intended to affect valve bias or pre-stress94
- F16F 9/3481Characterised by shape or construction of throttling passages in piston67
Recent patents
- Controlled damper with proportional valve and cross-flow bypass sleeve29 Sep 2026US 12,747,769 B2Beijingwest Industries Co., Ltd.
- Vibration dampers for a vehicle22 Sep 2026US 12,742,484 B2thyssenkrupp AG
- Shock absorber22 Sep 2026US 12,742,486 B2Hl Mando Corporation
- Frequency-sensitive shock absorber25 Aug 2026US 12,716,464 B2Hl Mando Corporation
- Device for controlling fluid flow in a shock assembly18 Aug 2026US 12,710,084 B2Fox Factory, Inc.
- Shock absorber and damping force generation mechanism17 Sep 2026US 2026/0276054 A1Hitachi Astemo, Ltd.
- Damping force adjusting device and shock absorbing device20 Aug 2026US 2026/0243327 A1Astemo, Ltd.
- Shock absorber, shock absorber manufacturing method, valve, and valve manufacturing method6 Aug 2026US 2026/0226957 A1Hitachi Astemo, Ltd.
- Damping valve and shock absorber30 Jul 2026US 2026/0218771 A1KYB Corporation
- Progressive end-stop control valves for vibration dampers30 Jul 2026US 2026/0218772 A1thyssenkrupp AG
Most cited
By later US patents
- Damping adjuster for shock absorber218US 6,360,857 B1Fox Factory, Inc. · 2002
- Load dependent damper for a vehicle suspension system167US 8,991,840 B2Oshkosh Defense, LLC · 2015
- Suspension damper with remotely-operable valve147US 9,239,090 B2Fox Factory, Inc. · 2016
- Vehicle height adjustment suspension device128US 8,262,100 B22012
- Vibration mode responsive variable damping force shock absorber with feature of automatic selection of damping mode depending upon vibration mode of vehicular body127US 5,261,448 AAtsugi Unisia Corporation · 1993