Variable compressor housing
US-11971035-B2 · Apr 30, 2024 · US
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using rotating valves
using rotating 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 | F04C28/14 |
| Official title | using rotating valves |
| Display label | using rotating valves |
| Total patents | 13 |
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 | 2 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary compressors with variable speed and volume control
US-11852145-B2 · Dec 26, 2023 · US
Rotary displacement compressor having a check valve and a backflow control valve arranged in series through a discharge pipe
US-11401934-B2 · Aug 2, 2022 · US
Variable compressor housing
US-2021372406-A1 · Dec 2, 2021 · US
Compressor
US-2021164471-A1 · Jun 3, 2021 · US
Variable volume ratio compressor
US-10677246-B2 · Jun 9, 2020 · US
Rotary compressors with variable speed and volume control
US-2020132074-A1 · Apr 30, 2020 · US
Rotary compressors with variable speed and volume control
US-10533556-B2 · Jan 14, 2020 · US
Rotary Displacement Compressor
US-2019338773-A1 · Nov 7, 2019 · US
Compressor
US-2019301450-A1 · Oct 3, 2019 · US
Variable volume ratio compressor
US-2018017060-A1 · Jan 18, 2018 · US
Gas compressor control system preventing vibration damage
US-9175691-B2 · Nov 3, 2015 · US
Rotary compressors with variable speed and volume control
US-2015093273-A1 · Apr 2, 2015 · US