Hydraulic piston pump/motor with non-cantilevered pistons
US-12553344-B2 · Feb 17, 2026 · US
having two or more sets of cylinders or pistons
having two or more sets of cylinders or pistons · 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 | F03C1/0639 |
| Official title | {having two or more sets of cylinders or pistons} |
| Display label | having two or more sets of cylinders or pistons |
| Total patents | 25 |
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 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydraulic piston pump/motor with non-cantilevered pistons
US-2025290418-A1 · Sep 18, 2025 · US
Hydraulic pump motor
US-12104569-B2 · Oct 1, 2024 · US
Support system for a displacement adjustment plate of an axial piston machine
US-11767833-B2 · Sep 26, 2023 · US
Axial Piston Device
US-2023228262-A1 · Jul 20, 2023 · US
Hydrostatic piston machine unit
US-11592012-B2 · Feb 28, 2023 · US
Support system for a displacement adjustment plate of an axial piston machine
US-2022325704-A1 · Oct 13, 2022 · US
Hydraulic pump motor
US-2022275792-A1 · Sep 1, 2022 · US
Port plate for integrated drive generator
US-11002258-B2 · May 11, 2021 · US
Hydrostatic Piston Machine Unit
US-2021071528-A1 · Mar 11, 2021 · US
Hydraulic rotary machine
US-10808686-B2 · Oct 20, 2020 · US
Cylinder block and swash plate type liquid-pressure rotating apparatus including same
US-10794185-B2 · Oct 6, 2020 · US
Hydraulic rotary machine
US-2020063723-A1 · Feb 27, 2020 · US
Cylinder block and swash plate type liquid-pressure rotating apparatus including same
US-2019264564-A1 · Aug 29, 2019 · US
Flow divider assembly
US-10385882-B1 · Aug 20, 2019 · US
Hydraulic machine
US-10385887-B2 · Aug 20, 2019 · US
Port plate for integrated drive generator
US-2019219041-A1 · Jul 18, 2019 · US
Opposed swash plate type fluid pressure rotating machine
US-9856851-B2 · Jan 2, 2018 · US
Hydrostatic Axial Piston Machine with Control Disk
US-2017159637-A1 · Jun 8, 2017 · US
Hydraulic machine
US-2016230788-A1 · Aug 11, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F03C1/0639?
- CPC F03C1/0639 is the Cooperative Patent Classification code for “having two or more sets of cylinders or pistons.”
- How many patents are filed under CPC F03C1/0639 (having two or more sets of cylinders or pistons)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC F03C1/0639 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).