F16F 13/1481
Characterised by features of plastic springs
Official title: {characterised by features of plastic springs, e.g. presence of cavities or stiffeners; characterised by features of flexible walls of equilibration chambers, i.e. membranes}
F16F13/1481 (Characterised by features of plastic springs) appears on 46 US grants and 35 published applications in this corpus.
Search patents in F16F- Granted patents
- 46
- Published applications
- 35
- Assignees
- 34
- Inventors
- 97
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 1 | 3 |
| 2016 | 0 | 1 |
| 2017 | 3 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 3 |
| 2020 | 3 | 6 |
| 2021 | 3 | 3 |
| 2022 | 7 | 4 |
| 2023 | 3 | 4 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
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Most cited
By later US patents
- Elastomeric sleeve spring39US 5,024,425 AFirma Carl Freudenberg · 1991
- Hydraulically damping bearing32US 4,705,410 ADr. Ing. h,c.F. Porsche Aktiengesellschaft · 1987
- Elastomeric sleeve spring with axially spaced spring bodies29US 5,123,634 AFirma Carl Freudenberg · 1992
- Rotating shaft damping with electro-rheological fluid19US 9,841,077 B2Bell Helicopter Textron Inc. · 2017
- Fluid-filled elastic bushing having means for limiting elastic deformation of axial end portions of elastic member defining pressure-receiving chamber13US 4,893,798 ATokai Rubber Industries, Ltd. · 1990