B61G 11/00
Buffers
Official title: Buffers (springs F16F)
B61G11/00 (Buffers) appears on 154 US grants and 133 published applications in this corpus.
Search patents in B61G- Granted patents
- 154
- Published applications
- 133
- Assignees
- 87
- Inventors
- 290
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 1 |
| 2004 | 3 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 5 |
| 2010 | 1 | 4 |
| 2011 | 2 | 4 |
| 2012 | 5 | 8 |
| 2013 | 4 | 6 |
| 2014 | 7 | 3 |
| 2015 | 1 | 7 |
| 2016 | 5 | 8 |
| 2017 | 8 | 11 |
| 2018 | 6 | 9 |
| 2019 | 9 | 14 |
| 2020 | 10 | 9 |
| 2021 | 12 | 5 |
| 2022 | 11 | 11 |
| 2023 | 2 | 6 |
| 2024 | 9 | 8 |
| 2025 | 9 | 5 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B61G 11/16Absorbing shocks by permanent deformation of buffer element78
- B61G 11/18Details29
- B61G 11/12Buffers: with fluid springs or shock-absorbers27
- B61G 11/08Buffers: with rubber springs17
- B61G 11/14Absorbing shocks by mechanical friction action12
- B61G 11/02Buffers: with metal springs11
- B61G 11/10Buffers: with combined rubber and metal springs5
Recent patents
- End cab switcher locomotive4 Aug 2026US 12,698,012 B2Siemens Mobility GmbH
- Railcar bodyshell4 Aug 2026US 12,698,014 B2Kawasaki Railcar Manufacturing Co., Ltd.
- End enclosure for light rail vehicles26 May 2026US 12,637,117 B2Applied Research Associates, Inc.
- Front cover for a rail vehicle coupler26 May 2026US 12,637,119 B2Dellner Couplers AB
- Railway vehicle with collision-protecting crushable areas3 Mar 2026US 12,565,245 B2ALSTOM Holdings
- 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
- Impact energy absorbing device for vehicle17 Jul 2025US 2025/0229737 A1Axtone S.A.
- Article conveyance device26 Jun 2025US 2025/0206526 A1Daifuku Co., Ltd.
- Coupler for a railway vehicle with a biasing device, and method for overhauling a coupler22 May 2025US 2025/0162623 A1Dellner Couplers AB
Most cited
By later US patents
- Polymeric apparatus and method of making the same84US 4,566,678 AMiner Enterprises, Inc. · 1986
- Buffer cartridge36US 5,104,101 AMiner Enterprises, Inc. · 1992
- Elastomeric spring unit31US 5,351,844 AMiner Enterprises, Inc. · 1994
- Vehicular shock absorber28US 6,702,345 B1OM Corporation · 2004
- Cushioning device24US 4,111,406 AMidland-Ross Corporation · 1978