Pump apparatus
US-2025327452-A1 · Oct 23, 2025 · US
Protection against sudden pressure change, e.g. check valves
Protection against sudden pressure change, e.g. 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 | F04D15/0083 |
| Official title | {Protection against sudden pressure change, e.g. check valves} |
| Display label | Protection against sudden pressure change, e.g. check valves |
| Total patents | 34 |
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 | 1 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pumps with backup capability
US-11976599-B1 · May 7, 2024 · US
Method for providing at least one item of information relating to a hydraulic system
US-2024102497-A1 · Mar 28, 2024 · US
Processing of operating data from a plurality of conveyor lines connected in parallel, where each line has a flow resistance
US-2024068849-A1 · Feb 29, 2024 · US
Quick startup device for centrifugal pump
US-11555497-B2 · Jan 17, 2023 · US
Fluid pump and outlet check valve assembly thereof
US-11499559-B2 · Nov 15, 2022 · US
Quick startup device for centrifugal pump
US-2022325716-A1 · Oct 13, 2022 · US
Apparatus and method for alleviating and preventing cavitation surge of water supply conduit system
US-11378084-B2 · Jul 5, 2022 · US
Fluid pump and outlet check valve assembly thereof
US-2022136511-A1 · May 5, 2022 · US
Pump device, cooling unit, and cooling system
US-2022025890-A1 · Jan 27, 2022 · US
Pump device, industrial water system, method for operating an industrial water system, and self-teaching method for a delivery pump in an industrial water system
US-11221149-B2 · Jan 11, 2022 · US
Pressure surge and water hammer mitigation device and method
US-2021405669-A1 · Dec 30, 2021 · US
Pressure surge and water hammer mitigation device and method
US-11209842-B1 · Dec 28, 2021 · US
Apparatus and method for alleviating and preventing cavitation surge of water supply conduit system
US-2021088048-A1 · Mar 25, 2021 · US
Method for controlling a trim-adjustment mechanism for a centrifugal compressor
US-10859097-B2 · Dec 8, 2020 · US
Water supply system
US-10626872-B2 · Apr 21, 2020 · US
Apparatus and method for alleviating and preventing cavitation surge of water supply conduit system
US-2020088203-A1 · Mar 19, 2020 · US
Method and system for controlling a variable-geometry compressor
US-2020063651-A1 · Feb 27, 2020 · US
Electronically-controlled compressed air system
US-10502213-B2 · Dec 10, 2019 · US
Method for controlling a trim-adjustment mechanism for a centrifugal compressor
US-2019285086-A1 · Sep 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D15/0083?
- CPC F04D15/0083 is the Cooperative Patent Classification code for “Protection against sudden pressure change, e.g. check valves.”
- How many patents are filed under CPC F04D15/0083 (Protection against sudden pressure change, e.g. check valves)?
- Our database includes 34 publications tagged with this CPC code.
- Is patent activity under CPC F04D15/0083 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).