B61G 11/12
Buffers: with fluid springs or shock-absorbers
Official title: with fluid springs or shock-absorbers; Combinations thereof
B61G11/12 (Buffers: with fluid springs or shock-absorbers) appears on 27 US grants and 21 published applications in this corpus.
Search patents in B61G- Granted patents
- 27
- Published applications
- 21
- Assignees
- 20
- Inventors
- 64
- Latest grant
- 22 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 4 |
| 2023 | 1 | 2 |
| 2024 | 3 | 1 |
| 2025 | 3 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for monitoring the health of a damper for a rail vehicle22 Apr 2025US 12,280,811 B2Dellner Couplers AB
- Piston rod end for a linear actuator, piston assembly and sealing method for a piston rod end8 Apr 2025US 12,269,517 B2Dellner Couplers AB
- Guide-type anti-climbing energy-absorbing device based on hydraulic shearing7 Jan 2025US 12,187,328 B2Southwest Jiaotong University
- Anti-collision buffering device for high-speed train26 Nov 2024US 12,151,720 B1Taiyuan University of Technology
- Crash energy management systems for car coupling systems of rail cars15 Oct 2024US 12,116,026 B2Amsted Rail Company, Inc.
- Railway damper valve assembly, and railway damper comprising such a railway damper valve assembly30 Jul 2026US 2026/0217288 A1Dellner Dampers AB
- Tubular energy absorber having buffer unit18 Dec 2025US 2025/0383003 A1Korea Railroad Research Institute
- Guide-type anti-climbing energy-absorbing device based on hydraulic shearing24 Oct 2024US 2024/0351621 A1Southwest Jiaotong University
- System and method for monitoring the health of a damper for a rail vehicle24 Aug 2023US 2023/0264723 A1Dellner Couplers AB
- Buffer, in particular for a rail vehicle6 Jul 2023US 2023/0211816 A1Faiveley Transport Schwab AG
Most cited
By later US patents
- Buffer cartridge36US 5,104,101 AMiner Enterprises, Inc. · 1992
- Reversibly expandable energy absorbing assembly utilizing actively controlled and engineered materials for impact management and methods for operating the same17US 7,140,478 B2General Motors Corporation · 2006
- Energy absorbers15US 5,653,425 AOleo International Limited · 1997
- Buffer, particularly suitable for use in railway vehicles13US 4,002,244 AThe Japan Steel Works, Ltd. · 1977
- Rail car buffer11US 6,047,839 A2000