Rotary swash plate hydraulic pump
US-12584467-B2 · Mar 24, 2026 · US
Check valves
Check valves · 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 | F04B1/182 |
| Official title | Check valves |
| Display label | Check valves |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston pump having plastic material inlet valve insert part for a high pressure cleaning device
US-12565888-B2 · Mar 3, 2026 · US
Rotary swash plate hydraulic pump
US-2025207570-A1 · Jun 26, 2025 · US
Rotary swash plate hydraulic pump
US-2025188913-A1 · Jun 12, 2025 · US
Brake hydraulic pressure control apparatus
US-12122334-B2 · Oct 22, 2024 · US
Cover, fluid end and plunger pump
US-12044234-B2 · Jul 23, 2024 · US
Piston pump for a high pressure cleaning device
US-2023304485-A1 · Sep 28, 2023 · US
Cover, fluid end and plunger pump
US-2023138582-A1 · May 4, 2023 · US
Piston-valve engagement in fluid sprayers
US-11371492-B2 · Jun 28, 2022 · US
Brake hydraulic pressure control apparatus
US-2022176929-A1 · Jun 9, 2022 · US
Control mechanism for stepless transmission
US-10890252-B2 · Jan 12, 2021 · US
High pressure pumps having a check valve keeper and associated systems and methods
US-10808688-B1 · Oct 20, 2020 · US
Control mechanism for stepless transmission
US-2019390767-A1 · Dec 26, 2019 · US
Discharge valve and compressor having the same
US-2019383278-A1 · Dec 19, 2019 · US
Piston-valve engagement in fluid sprayers
US-2019368476-A1 · Dec 5, 2019 · US
Valve With Hardened Insert
US-2019368619-A1 · Dec 5, 2019 · US
High pressure generator with bidirectional check valves controlling overpressure
US-10422326-B2 · Sep 24, 2019 · US
Piston engaging with valve for self-priming in fluid sprayers
US-10422325-B2 · Sep 24, 2019 · US
Pump, a homogenizer comprising said pump and a method for pumping a liquid product
US-10100830-B2 · Oct 16, 2018 · US
Ultrahigh pressure generator
US-2018149145-A1 · May 31, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B1/182?
- CPC F04B1/182 is the Cooperative Patent Classification code for “Check valves.”
- How many patents are filed under CPC F04B1/182 (Check valves)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC F04B1/182 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).