Piston intended for a fluid machine and provided with a system for pressing seals, fluid machine comprising such a piston
US-2026092603-A1 · Apr 2, 2026 · US
sealing being provided on the piston
sealing being provided on the piston · 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 | F04B39/042 |
| Official title | {sealing being provided on the piston} |
| Display label | sealing being provided on the piston |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston ring
US-12578017-B2 · Mar 17, 2026 · US
Stuffing box for use with reciprocal moveable piston rods and method of manufacturing
US-12510158-B2 · Dec 30, 2025 · US
Sealing resin composition and seal
US-2025354043-A1 · Nov 20, 2025 · US
Positive displacement machine, compressor, cooling device, and electronic apparatus
US-12449168-B2 · Oct 21, 2025 · US
Piston ring and booster pump
US-12281709-B2 · Apr 22, 2025 · US
Fluid compression apparatus and filling station
US-2025026627-A1 · Jan 23, 2025 · US
Stuffing box for use with reciprocal moveable piston rods and method of manufacturing
US-2024418264-A1 · Dec 19, 2024 · US
Piston ring and booster pump
US-2024337316-A1 · Oct 10, 2024 · US
Stuffing box for use with reciprocal moveable piston rods and method of manufacturing
US-12092216-B2 · Sep 17, 2024 · US
Piston assembly, air cylinder and apparatus for processing substrate
US-11965597-B2 · Apr 23, 2024 · US
Piston ring
US-2024125386-A1 · Apr 18, 2024 · US
Piston assembly, air cylinder and apparatus for processing substrate
US-2023400097-A1 · Dec 14, 2023 · US
Cupseal for compressor and method for preparing the same
US-11773976-B2 · Oct 3, 2023 · US
Positive displacement machine, compressor, cooling device, and electronic apparatus
US-2023097432-A1 · Mar 30, 2023 · US
Compressor unit
US-2022314938-A1 · Oct 6, 2022 · US
Piston ring and compressor
US-11346332-B2 · May 31, 2022 · US
Lubrication system for a piston pump
US-11326693-B2 · May 10, 2022 · US
Cupseal for compressor and method for preparing the same
US-2021388902-A1 · Dec 16, 2021 · US
Stuffing box for use with reciprocal moveable piston rods and method of manufacturing
US-2021277997-A1 · Sep 9, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/042?
- CPC F04B39/042 is the Cooperative Patent Classification code for “sealing being provided on the piston.”
- How many patents are filed under CPC F04B39/042 (sealing being provided on the piston)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/042 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).