B61F 5/302
Leaf springs
Official title: {Leaf springs}
B61F5/302 (Leaf springs) appears on 51 US grants and 38 published applications in this corpus.
Search patents in B61F- Granted patents
- 51
- Published applications
- 38
- Assignees
- 19
- Inventors
- 61
- Latest grant
- 28 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 0 | 7 |
| 2016 | 7 | 7 |
| 2017 | 6 | 2 |
| 2018 | 3 | 5 |
| 2019 | 4 | 7 |
| 2020 | 8 | 4 |
| 2021 | 3 | 1 |
| 2022 | 0 | 1 |
| 2023 | 3 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Railway vehicle bogie and associated railway vehicle and machining process28 May 2024US 11,993,296 B2Alstom Transport Technologies
- Railcar driving bogie22 Aug 2023US 11,731,669 B2Kawasaki Railcar Manufacturing Co., Ltd.
- Method of assembling railcar bogie and wheel base fixing jig for use therein7 Mar 2023US 11,597,414 B2Kawasaki Railcar Manufacturing Co., Ltd.
- Railcar bogie21 Feb 2023US 11,584,402 B2Kawasaki Railcar Manufacturing Co., Ltd.
- Method of assembling railcar bogie, measurement jig, and railcar bogie31 Aug 2021US 11,104,360 B2Kawasaki Jukogyo Kabushiki Kaisha
- Railway vehicle bogie and associated railway vehicle and machining process19 May 2022US 2022/0153321 A1Alstom Transport Technologies
- Railcar driving bogie3 Jun 2021US 2021/0163048 A1Kawasaki Jukogyo Kabushiki Kaisha
- Railcar bogie8 Oct 2020US 2020/0317233 A1Kawasaki Jukogyo Kabushiki Kaisha
- Method of assembling railcar bogie and wheel base fixing jig for use therein27 Aug 2020US 2020/0269886 A1Kawasaki Jukogyo Kabushiki Kaisha
- Railcar bogie frame and bogie including same23 Jul 2020US 2020/0231188 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- Single axle truck suspension for railway flat car35US 4,590,864 APullman Standard Inc. · 1986
- Running gear of a railway vehicle13US 5,039,071 AKrupp Bruninghaus GmbH · 1991
- Railway vehicle bogie and process for manufacturing a side member of such a bogie10US 6,305,297 B1Alstom Transport SA · 2001
- Railway bogie9US 3,945,325 ASwiss Aluminium Ltd. · 1976
- Apparatus for controlling friction between the leaf springs of a laminated leaf spring assembly of a vehicle7US 4,463,936 ANHK Spring Co., Ltd. · 1984