B61F 5/301
Incorporating metal springs
Official title: {incorporating metal springs}
B61F5/301 (Incorporating metal springs) appears on 88 US grants and 79 published applications in this corpus.
Search patents in B61F- Granted patents
- 88
- Published applications
- 79
- Assignees
- 51
- Inventors
- 168
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 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 | 1 | 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 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 4 |
| 2015 | 1 | 8 |
| 2016 | 8 | 8 |
| 2017 | 6 | 3 |
| 2018 | 5 | 6 |
| 2019 | 5 | 10 |
| 2020 | 8 | 10 |
| 2021 | 6 | 3 |
| 2022 | 7 | 8 |
| 2023 | 8 | 5 |
| 2024 | 1 | 2 |
| 2025 | 4 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Locked-axle spring compression system and method15 Sep 2026US 12,735,080 B2BNSF Railway Company
- Bogie for a railway vehicle with roll stabiliser26 May 2026US 12,637,116 B2Cg Rail—Chinesisch-Deutsches Forschungs—Und Entwicklungszentrum FüR Bahn—Und Verkehrstechnik Dresden GmbH
- Railroad car truck side frame21 Oct 2025US 12,448,014 B2Transportation IP Holdings, LLC
- Traction rod assembly16 Sep 2025US 12,415,553 B2Wabtec UK Limited
- Bogie for a rail vehicle and rail vehicle carriage having at least one bogie, rail vehicle having at least one rail vehicle carriage, and method for adjusting the height of a carriage body of a rail vehicle carriage22 Jul 2025US 12,365,368 B2Stadler Rail AG
- Electric rail vehicle28 Aug 2025US 2025/0269882 A1Parallel Systems, Inc.
- Locked-axle spring compression system and method28 Mar 2024US 2024/0101165 A1BNSF Railway Company
- Locked-axle spring compression system and method28 Mar 2024US 2024/0101166 A1BNSF Railway Company
- Electric rail vehicle28 Dec 2023US 2023/0415793 A1Parallel Systems, Inc.
- Bogie for a railway vehicle with roll stabiliser1 Jun 2023US 2023/0166777 A1Cg Rail - Chinesisch-Deutsches Forschungs- Und Entwicklungszentrum FüR Bahn
Most cited
By later US patents
- Multi-axle railroad car truck50US 5,632,208 ANational Castings, Inc. · 1997
- Single axle truck suspension for railway flat car35US 4,590,864 APullman Standard Inc. · 1986
- Multi-purpose universal sideframe for railway trucks15US 7,017,498 B2ASF-Keystone, Inc. · 2006
- Railway truck suspension design14US 7,263,930 B2ASF-Keystone, Inc. · 2007
- Running gear of a railway vehicle13US 5,039,071 AKrupp Bruninghaus GmbH · 1991