O-ring collar seal
US-12385516-B2 · Aug 12, 2025 · US
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L-section rings
L-section rings · 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 | F16J9/02 |
| Official title | L-section rings |
| Display label | L-section rings |
| Total patents | 13 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2019 | 1 |
| 2020 | 4 |
| 2022 | 2 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
O-ring collar seal
US-2024280133-A1 · Aug 22, 2024 · US
Piston ring and piston with internal groove sealing
US-11493129-B2 · Nov 8, 2022 · US
Piston ring and piston with internal groove sealing
US-2022049769-A1 · Feb 17, 2022 · US
Two-part oil control ring having axial stabilization and twist compensation
US-10871228-B2 · Dec 22, 2020 · US
Compressor assembly for a compressed-air feed of a compressed-air supply system
US-10851894-B2 · Dec 1, 2020 · US
Piston with enhanced cooling gallery
US-10753310-B2 · Aug 25, 2020 · US
Compressor assembly for a compressed-air feed of a compressed-air supply system
US-2020025189-A1 · Jan 23, 2020 · US
Two-part oil control ring having axial stabilization and twist compensation
US-2019219168-A1 · Jul 18, 2019 · US
Low tension piston rings and method for manufacturing the same
US-9494233-B2 · Nov 15, 2016 · US
Low tension piston rings and method for manufacturing the same
US-2016138714-A1 · May 19, 2016 · US
Low tension piston rings and method for manufacturing the same
US-9261190-B2 · Feb 16, 2016 · US
Engine having piston with l-shaped timing ring
US-2015021861-A1 · Jan 22, 2015 · US