B61F 5/307
Incorporating fluid springs
Official title: {incorporating fluid springs}
B61F5/307 (Incorporating fluid springs) appears on 15 US grants and 15 published applications in this corpus.
Search patents in B61F- Granted patents
- 15
- Published applications
- 15
- Assignees
- 12
- Inventors
- 45
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 2 |
| 2018 | 1 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 2 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Locked-axle spring compression system and method15 Sep 2026US 12,735,080 B2BNSF Railway Company
- Ultralight two-track train that does not derail4 Mar 2025US 12,240,504 B2
- Wheel axle guiding assembly with longitudinal hydro-mechanical converters and associated running gear3 Dec 2024US 12,157,506 B2Bombardier Transportation GmbH
- 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.
- Locked-axle spring compression system and method3 Oct 2023US 11,772,689 B1BNSF Railway Company
- 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
- Methods and systems for dynamic weight management13 Oct 2022US 2022/0324492 A1Transportation IP Holdings, LLC
- Ultralight two-track train that does not derail24 Jun 2021US 2021/0188330 A1
- 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.
Most cited
By later US patents
- Railway bogie5US 7,934,458 B2ContiTech Luftfedersysteme GmbH · 2011
- Railroad freight car3US 5,479,863 AABB Henschel Waggon Union GmbH · 1996
- Gas spring end members as well as gas spring assemblies, suspension systems and methods1US 10,197,126 B2Firestone Industrial Products Company, LLC · 2019
- Methods and systems for dynamic weight management1US 11,370,465 B2Transportation IP Holdings, LLC · 2022
- Locked-axle spring compression system and method1US 11,772,689 B1BNSF Railway Company · 2023