Refrigeration heat pump unit
US-2025305728-A1 · Oct 2, 2025 · US
with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02)
with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02) · 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 | F04D17/14 |
| Official title | with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02) |
| Display label | with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02) |
| Total patents | 28 |
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 | 2 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Modularized subsea compressor train and method of installation
US-11970924-B2 · Apr 30, 2024 · US
Turbofan
US-11953020-B2 · Apr 9, 2024 · US
Centrifugal compressor with recirculation passage
US-11808277-B2 · Nov 7, 2023 · US
Modularized Subsea Compressor Train and Method of Installation
US-2023107601-A1 · Apr 6, 2023 · US
Centrifugal compressor with recirculation passage
US-2023025097-A1 · Jan 26, 2023 · US
Centrifugal compressor with recirculation passage
US-11499561-B2 · Nov 15, 2022 · US
System and method for evacuating a process space
US-11473573-B2 · Oct 18, 2022 · US
Turbofan
US-2022213898-A1 · Jul 7, 2022 · US
Centrifugal compressor with recirculation passage
US-2022010802-A1 · Jan 13, 2022 · US
Centrifugal compressor with recirculation passage
US-11156226-B2 · Oct 26, 2021 · US
Turbocharger engine
US-10760477-B2 · Sep 1, 2020 · US
System And Method For Evacuating A Process Space
US-2020240405-A1 · Jul 30, 2020 · US
Multi-stage horizontal centrifugal pump for conveying a fluid and a method for repairing the same
US-10724526-B2 · Jul 28, 2020 · US
Impeller and fan including the impeller
US-10458423-B2 · Oct 29, 2019 · US
Centrifugal compressor with recirculation passage
US-2019249681-A1 · Aug 15, 2019 · US
Centrifugal compressor and centrifugal unit having the same
US-10323653-B2 · Jun 18, 2019 · US
Variable return channel vanes to extend the operating flow range of a vapor cycle centrifugal compressor
US-2019178259-A1 · Jun 13, 2019 · US
Variable-speed multi-stage refrigerant centrifugal compressor with diffusers
US-10072663-B2 · Sep 11, 2018 · US
Turbocharger with compressor operable in either single-stage mode or two-stage serial mode
US-9869237-B2 · Jan 16, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D17/14?
- CPC F04D17/14 is the Cooperative Patent Classification code for “with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02).”
- How many patents are filed under CPC F04D17/14 (with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side-loads, (surge control F04D27/02))?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC F04D17/14 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).