Piston, air spring and motor vehicle
US-2025271048-A1 · Aug 28, 2025 · US
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characterised by intermediate rings or other not embedded reinforcing elements (wall structure F16F9/0409)
characterised by intermediate rings or other not embedded reinforcing elements (wall structure F16F9/0409) · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16F9/0445 |
| Official title | {characterised by intermediate rings or other not embedded reinforcing elements (wall structure F16F9/0409)} |
| Display label | characterised by intermediate rings or other not embedded reinforcing elements (wall structure F16F9/0409) |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 1 |
| 2018 | 1 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Bellows suspension unit
US-12135069-B2 · Nov 5, 2024 · US
Bellows suspension unit
US-2023383813-A1 · Nov 30, 2023 · US
Air spring
US-11473643-B2 · Oct 18, 2022 · US
Gas spring assemblies and methods of assembling same
US-11421750-B2 · Aug 23, 2022 · US
Air spring gaiters with floating ring
US-11401994-B2 · Aug 2, 2022 · US
Air spring
US-2022034381-A1 · Feb 3, 2022 · US
Gas Spring Assemblies And Methods Of Assembling Same
US-2021364057-A1 · Nov 25, 2021 · US
Vulcanized support ring for hybrid air spring bellow
US-2021172491-A1 · Jun 10, 2021 · US
Air Spring Gaiters With Floating Ring
US-2021140506-A1 · May 13, 2021 · US
End member assemblies as well as gas spring assemblies and suspension systems including same
US-10119590-B2 · Nov 6, 2018 · US
End member assemblies as well as gas spring assemblies and suspension systems including same
US-2017204929-A1 · Jul 20, 2017 · US
Air spring having hybrid bellows
US-9512895-B2 · Dec 6, 2016 · US
Flexible spring members, gas spring assemblies and methods
US-9366304-B2 · Jun 14, 2016 · US
Air spring
US-2016107496-A1 · Apr 21, 2016 · US
Flexible spring members as well as gas spring assemblies and methods of manufacture including same
US-9261156-B2 · Feb 16, 2016 · US
Gas spring assembly and method
US-9194453-B2 · Nov 24, 2015 · US
Unreinforced elastomeric spring wall, gas spring and method
US-9127737-B2 · Sep 8, 2015 · US