Hydraulic apparatus
US-10519990-B2 · Dec 31, 2019 · US
having rotary cylinder block
having rotary cylinder block · 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 | F04B1/20 |
| Official title | having rotary cylinder block |
| Display label | having rotary cylinder block |
| Total patents | 203 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 11 |
| 2017 | 16 |
| 2018 | 12 |
| 2019 | 23 |
| 2020 | 27 |
| 2021 | 31 |
| 2022 | 18 |
| 2023 | 20 |
| 2024 | 18 |
| 2025 | 16 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Axial Piston Machine with Recess in the Region of the Loading Pressure Channel
US-2019360482-A1 · Nov 28, 2019 · US
Axial Piston Machine
US-10465668-B2 · Nov 5, 2019 · US
Cylinder block and swash plate type liquid-pressure rotating apparatus including same
US-2019264564-A1 · Aug 29, 2019 · US
Hydrostatic pump barrel with sloped kidney ports
US-10364806-B2 · Jul 30, 2019 · US
Port plate for integrated drive generator
US-2019219041-A1 · Jul 18, 2019 · US
Hydrostatic Piston Engine
US-2019178226-A1 · Jun 13, 2019 · US
Fluid pump
US-2019154016-A1 · May 23, 2019 · US
Hydraulic rotary machine and valve plate thereof
US-2019145388-A1 · May 16, 2019 · US
Hydrostatic drive
US-10288094-B2 · May 14, 2019 · US
Hydraulic unit
US-10228013-B2 · Mar 12, 2019 · US
Low profile electro-hydrostatic actuator
US-2019063472-A1 · Feb 28, 2019 · US
Hydraulic rotary machine
US-2019055931-A1 · Feb 21, 2019 · US
Hydraulic arrangement
US-10145366-B2 · Dec 4, 2018 · US
Piston pump and valve plate of piston pump
US-10145367-B2 · Dec 4, 2018 · US
Variable displacement fuel pump background
US-2018340531-A1 · Nov 29, 2018 · US
Electro hydrostatic actuators
US-10087962-B2 · Oct 2, 2018 · US
Composite plain bearing, cradle guide, and sliding nut
US-10077807-B2 · Sep 18, 2018 · US
Connector plate, hydraulic machine having a connector plate, and hydrostatic unit having a hydraulic machine and a hydraulic attachment part
US-2018252209-A1 · Sep 6, 2018 · US
Control mechanism for stepless transmission
US-2018223992-A1 · Aug 9, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B1/20?
- CPC F04B1/20 is the Cooperative Patent Classification code for “having rotary cylinder block.”
- How many patents are filed under CPC F04B1/20 (having rotary cylinder block)?
- Our database includes 203 publications tagged with this CPC code.
- Is patent activity under CPC F04B1/20 growing?
- Publication counts under this code: 18 in 2024 vs 16 in 2025 (latest complete years).