B61F 5/144
Comprising fluid damping devices
Official title: {comprising fluid damping devices (B61F5/146 takes precedence)}
B61F5/144 (Comprising fluid damping devices) appears on 31 US grants and 16 published applications in this corpus.
Search patents in B61F- Granted patents
- 31
- Published applications
- 16
- Assignees
- 29
- Inventors
- 81
- Latest grant
- 24 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 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 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 1 |
| 2021 | 1 | 3 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Maglev vehicle and suspension frame assembly thereof24 Dec 2024US 12,172,680 B2Crrc Tangshan Co., Ltd.
- Method for train suspension control by means of multiple air springs, system for train suspension control by means of multiple air springs, and train18 Jun 2024US 12,012,129 B2Crrc Tangshan Co., Ltd.
- Railcar bogie frame12 Sep 2023US 11,753,052 B2Kawasaki Railcar Manufacturing Co., Ltd.
- Railway truck assembly having compressible side bearings28 Mar 2023US 11,613,281 B2Amsted Rail Company, Inc.
- Level control system for a vehicle, in particular a rail vehicle4 Oct 2022US 11,459,001 B2Knorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
- Railway truck assembly having compressible side bearings28 Apr 2022US 2022/0126890 A1Amsted Rail Company, Inc.
- Maglev vehicle and suspension frame assembly thereof23 Dec 2021US 2021/0394801 A1Crrc Tangshan Co., Ltd.
- Method for train suspension control by means of multiple air springs, system for train suspension control by means of multiple air springs, and train3 Jun 2021US 2021/0163047 A1Crrc Tangshan Co., Ltd.
- Railcar bogie frame4 Feb 2021US 2021/0031814 A1Kawasaki Jukogyo Kabushiki Kaisha
- Level control system for a vehicle, in particular a rail vehicle30 Apr 2020US 2020/0130714 A1Knorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
Most cited
By later US patents
- Height and inclination control of a wagon body38US 5,769,400 AKnorr-Bremse GmbH · 1998
- Laterally damped railway car31US 4,526,109 AThe Budd Company · 1985
- Spring device24US 6,102,378 APhoenix Aktiengesellschaft · 2000
- Swivel-truck spring system for railroad use16US 4,294,175 ASIG Schweizerische Industrie-Gesellschaft · 1981
- Railway freight car truck15US 8,590,460 B2Amsted Rail Company, Inc. · 2013