B61C 9/44
With hollow transmission shaft concentric with wheel axis
Official title: with hollow transmission shaft concentric with wheel axis
B61C9/44 (With hollow transmission shaft concentric with wheel axis) appears on 23 US grants and 15 published applications in this corpus.
Search patents in B61C- Granted patents
- 23
- Published applications
- 15
- Assignees
- 18
- Inventors
- 52
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Double-jointed coupling, bogie, rail vehicle, industrial application and computer program product25 Nov 2025US 12,480,548 B2Flender GmbH
- Gearbox with bearing configuration for rail vehicle5 Mar 2024US 11,920,669 B2Crrc Qishuyan Institute Co., Ltd.
- Arrangement for a rail vehicle19 Dec 2023US 11,845,474 B2Siemens Mobility GmbH
- Drive assembly for a rail vehicle31 Jan 2023US 11,565,727 B2Süddeutsche Gelenkscheibenfabrik GmbH & Co. KG
- Thread-reinforced joint device and coupling device for a vehicle drive12 May 2020US 10,648,513 B2Siemens Mobility GmbH
- Dual Coupling System for Driving Rail Vehicles5 Jun 2025US 2025/0180075 A1
- Double-jointed coupling, bogie, rail vehicle, industrial application and computer program product13 Jul 2023US 2023/0220886 A1Flender GmbH
- Arrangement for a rail vehicle6 Jul 2023US 2023/0211812 A1Siemens Mobility GmbH
- Gearbox with novel bearing configuration for railway vehicle20 Oct 2022US 2022/0333676 A1Crrc Qishuyan Institute Co., Ltd.
- Permanent magnet direct-drive bogie and rail vehicle thereof13 Jan 2022US 2022/0009528 A1Crrc Zhuzhou Locomotive Co., Ltd.
Most cited
By later US patents
- Railway vehicle drive16US 4,148,262 ACarl Hurth Maschinen- und Zahnradfabrik GmbH & Co. · 1979
- Motorized railway vehicles16US 4,170,945 AMaschinenfabrik Augsburg-Nurnberg Aktiengesellschaft · 1979
- Track-bound electric motor vehicle6US 4,444,120 ASiemens Aktiengesellschaft · 1984
- Double-axle drive for railway trucks of railraod vehicles5US 4,409,904 ACarl Hurth Maschinen- und Zahnradfabrik GmbH & Co. · 1983
- Drive unit for a rail vehicle4US 4,697,527 ACarl Hurth Maschinen- und Zahnradfabrik GmbH & Co. · 1987