Variable displacement pump systems
US-2024392780-A1 · Nov 28, 2024 · US
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10)
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10) · 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 | F04C14/18 |
| Official title | characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10) |
| Display label | characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10) |
| Total patents | 58 |
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 | 5 |
| 2016 | 7 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Sliding-pocket variable-displacement pump with compensation chambers
US-2024003346-A1 · Jan 4, 2024 · US
Sliding-pocket variable-displacement pump with compensation chambers
US-11846284-B1 · Dec 19, 2023 · US
Slide of variable oil pump for vehicle and method of manufacturing the same
US-11668298-B2 · Jun 6, 2023 · US
Hydraulic Gerotor pump for automatic transmission
US-11614158-B2 · Mar 28, 2023 · US
Helical spring for a pump having an adjustable delivery volume
US-11592021-B2 · Feb 28, 2023 · US
Positive displacement pump including an unloading device
US-11473574-B2 · Oct 18, 2022 · US
Variable displacement pump and control method therefor
US-11415128-B2 · Aug 16, 2022 · US
Helical spring for a pump having an adjustable delivery volume
US-2022065248-A1 · Mar 3, 2022 · US
Hydraulic gerotor pump for automatic transmission
US-2022010874-A1 · Jan 13, 2022 · US
Pump apparatus, test operation method of pump apparatus, motor assembly and method for identifying abnormal vibration of motor assembly
US-11209008-B2 · Dec 28, 2021 · US
Pump apparatus, test operation method of pump apparatus, motor assembly and method for identifying abnormal vibration of motor assembly
US-2021396238-A1 · Dec 23, 2021 · US
Positive displacement pump including an unloading device
US-11131303-B2 · Sep 28, 2021 · US
Positive displacement pump including an unloading device
US-2021262464-A1 · Aug 26, 2021 · US
Controlled variable delivery external gear machine
US-11022115-B2 · Jun 1, 2021 · US
Hydraulic device comprising a sealing element
US-10975699-B2 · Apr 13, 2021 · US
Oil pump
US-10662942-B2 · May 26, 2020 · US
Slide of Variable Oil Pump for Vehicle and Method of Manufacturing the Same
US-2020141404-A1 · May 7, 2020 · US
Variable displacement pump and control method therefor
US-2020141403-A1 · May 7, 2020 · US
Solenoid valve and oil pump
US-10584803-B2 · Mar 10, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C14/18?
- CPC F04C14/18 is the Cooperative Patent Classification code for “characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10).”
- How many patents are filed under CPC F04C14/18 (characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C14/10))?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC F04C14/18 growing?
- Publication counts under this code: 4 in 2023 vs 2 in 2024 (latest complete years).