Gas compressor and gas compression system
US-12454953-B2 · Oct 28, 2025 · US
Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable
Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable · 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 | F04C28/065 |
| Official title | {Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable} |
| Display label | Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluid routing for a vacuum pumping system
US-2025266268-A1 · Aug 21, 2025 · US
Gas Compressor and Gas Compression System
US-2025154954-A1 · May 15, 2025 · US
Multi-compressor system with normally-open valves in oil balancing connections
US-12241670-B2 · Mar 4, 2025 · US
Scroll compressor
US-12092109-B2 · Sep 17, 2024 · US
Scroll compressor
US-2024240637-A1 · Jul 18, 2024 · US
Air conditioner and compressor
US-11953008-B2 · Apr 9, 2024 · US
Oil control for climate-control system
US-11874031-B2 · Jan 16, 2024 · US
Compressor cylinder switching control method and device, unit and air conditioning system
US-11852132-B2 · Dec 26, 2023 · US
Method and device for controlling capacity change of compressor, and smart home appliance
US-11835040-B2 · Dec 5, 2023 · US
Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner
US-11808261-B2 · Nov 7, 2023 · US
Multi-compressor system with normally-open valves in oil balancing connections
US-2023314048-A1 · Oct 5, 2023 · US
Scroll compressors with different volume indexes and systems and methods for same
US-11635243-B2 · Apr 25, 2023 · US
Oil control for climate-control system
US-11300328-B2 · Apr 12, 2022 · US
Air conditioner and compressor
US-2022049701-A1 · Feb 17, 2022 · US
Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner
US-2021340977-A1 · Nov 4, 2021 · US
Compressor Cylinder Switching Control Method and Device, Unit and Air Conditioning System
US-2021270260-A1 · Sep 2, 2021 · US
Compressor and air conditioner
US-11067083-B2 · Jul 20, 2021 · US
Method and device for controlling capacity change of compressor, and smart home appliance
US-2021108845-A1 · Apr 15, 2021 · US
Variable-capacity mechanism of scroll compressor and scroll compressor
US-10941774-B2 · Mar 9, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C28/065?
- CPC F04C28/065 is the Cooperative Patent Classification code for “Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable.”
- How many patents are filed under CPC F04C28/065 (Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC F04C28/065 growing?
- Publication counts under this code: 4 in 2024 vs 4 in 2025 (latest complete years).