B61F 5/122
With friction surfaces
Official title: {with friction surfaces}
B61F5/122 (With friction surfaces) appears on 108 US grants and 74 published applications in this corpus.
Search patents in B61F- Granted patents
- 108
- Published applications
- 74
- Assignees
- 41
- Inventors
- 112
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 2 |
| 2003 | 1 | 4 |
| 2004 | 3 | 4 |
| 2005 | 3 | 3 |
| 2006 | 2 | 3 |
| 2007 | 4 | 4 |
| 2008 | 2 | 5 |
| 2009 | 4 | 2 |
| 2010 | 4 | 5 |
| 2011 | 1 | 4 |
| 2012 | 4 | 0 |
| 2013 | 0 | 5 |
| 2014 | 6 | 4 |
| 2015 | 2 | 1 |
| 2016 | 5 | 4 |
| 2017 | 1 | 1 |
| 2018 | 1 | 5 |
| 2019 | 1 | 5 |
| 2020 | 5 | 4 |
| 2021 | 4 | 3 |
| 2022 | 4 | 3 |
| 2023 | 2 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Railroad car truck damper wedge fittings4 Aug 2026US 12,698,016 B2National Steel Car Limited
- Railroad car truck damper wedge fittings7 Nov 2023US 11,807,282 B2National Steel Car Limited
- Railway truck assembly having compressible side bearings28 Mar 2023US 11,613,281 B2Amsted Rail Company, Inc.
- Friction wedge with improved bond characteristics29 Nov 2022US 11,511,777 B2Nevis Industries LLC
- Railroad car truck damper wedge fittings16 Aug 2022US 11,414,107 B2National Steel Car Limited
- Bolster friction pocket5 Sep 2024US 2024/0294195 A1Transportation IP Holdings, LLC
- Railroad car truck damper wedge fittings1 Feb 2024US 2024/0034366 A1National Steel Car Limited
- Railroad car truck damper wedge fittings8 Dec 2022US 2022/0388550 A1National Steel Car Limited
- Railroad car truck damper wedge fittings12 May 2022US 2022/0144321 A1National Steel Car Limited
- Railway truck assembly having compressible side bearings28 Apr 2022US 2022/0126890 A1Amsted Rail Company, Inc.
Most cited
By later US patents
- Railway truck damping assembly70US 4,915,031 AHansen Inc. · 1990
- Dual face friction wedge61US 5,511,489 AStandard Car Truck Company · 1996
- Rail road freight car with damped suspension60US 6,895,866 B2National Steel Car Limited · 2005
- Frictionally snubbed railway car truck59US 4,109,585 AAMSTED Industries Incorporated · 1978
- Squaring frictionally snubbed railway car truck56US 4,103,623 AAMSTED Industries Incorporated · 1978