Piston sealing ring assembly having a gap cover element
US-2021388901-A1 · Dec 16, 2021 · US
using separate springs {or elastic elements} expanding the rings; Springs therefor {; Expansion by wedging}
using separate springs {or elastic elements} expanding the rings; Springs therefor {; Expansion by wedging} · 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 | F16J9/06 |
| Official title | using separate springs {or elastic elements} expanding the rings; Springs therefor {; Expansion by wedging} |
| Display label | using separate springs {or elastic elements} expanding the rings; Springs therefor {; Expansion by wedging} |
| Total patents | 94 |
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 | 4 |
| 2016 | 10 |
| 2017 | 12 |
| 2018 | 6 |
| 2019 | 9 |
| 2020 | 6 |
| 2021 | 14 |
| 2022 | 7 |
| 2023 | 11 |
| 2024 | 8 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cylinder of an Internal Combustion Engine
US-2021381597-A1 · Dec 9, 2021 · US
Piston having two piston rings
US-11162585-B2 · Nov 2, 2021 · US
Three-part oil scraper ring
US-2021332885-A1 · Oct 28, 2021 · US
Sliding structure for internal combustion engine, method for controlling idling operation, and method for controlling operation of internal combustion engine
US-11111875-B2 · Sep 7, 2021 · US
Multi-piece oil scraper ring with reduced friction
US-2021270368-A1 · Sep 2, 2021 · US
Multiple-piece oil stripping piston ring with reduced friction
US-11092238-B2 · Aug 17, 2021 · US
Piston ring combination
US-2021164568-A1 · Jun 3, 2021 · US
Piston ring and compressor
US-2021156371-A1 · May 27, 2021 · US
Piston sealing ring assembly having a gap cover element
US-10975966-B2 · Apr 13, 2021 · US
Piston for an internal combustion engine
US-2021025494-A1 · Jan 28, 2021 · US
Combination oil ring
US-10890255-B2 · Jan 12, 2021 · US
Two part oil control ring having oil pressure effect ridges
US-10883600-B2 · Jan 5, 2021 · US
Two-part oil control ring having axial stabilization and twist compensation
US-10871228-B2 · Dec 22, 2020 · US
Reinforced sealing rings
US-2020362966-A1 · Nov 19, 2020 · US
Sliding structure for internal combustion engine, method for controlling idling operation, and method for controlling operation of internal combustion engine
US-2020325844-A1 · Oct 15, 2020 · US
Piston having two piston rings
US-2020248809-A1 · Aug 6, 2020 · US
Combined oil ring
US-10724636-B2 · Jul 28, 2020 · US
Combination oil ring
US-2020166135-A1 · May 28, 2020 · US
Side rail
US-10508738-B2 · Dec 17, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16J9/06?
- CPC F16J9/06 is the Cooperative Patent Classification code for “using separate springs {or elastic elements} expanding the rings; Springs therefor {; Expansion by wedging}.”
- How many patents are filed under CPC F16J9/06 (using separate springs {or elastic elements} expanding the rings; Springs therefor {; Expansion by wedging})?
- Our database includes 94 publications tagged with this CPC code.
- Is patent activity under CPC F16J9/06 growing?
- Publication counts under this code: 8 in 2024 vs 5 in 2025 (latest complete years).