Method for checking the state of a hydraulic accumulator
US-2025320882-A1 · Oct 16, 2025 · US
Testing of accumulators, e.g. for testing tightness
Testing of accumulators, e.g. for testing tightness · 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 | F15B2201/505 |
| Official title | Testing of accumulators, e.g. for testing tightness |
| Display label | Testing of accumulators, e.g. for testing tightness |
| Total patents | 29 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 7 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Prognostication and amelioration of gas ingress in hydraulic systems
US-12416321-B2 · Sep 16, 2025 · US
Method and system for monitoring hydraulic accumulator pressure
US-12286985-B2 · Apr 29, 2025 · US
Accumulator pre-charge monitoring using position sensor
US-11788563-B2 · Oct 17, 2023 · US
Prognostication and amelioration of gas ingress in hydraulic systems
US-2023167836-A1 · Jun 1, 2023 · US
Method and system for monitoring hydraulic accumulator pressure
US-2022213907-A1 · Jul 7, 2022 · US
Hydraulic pumping system with piston displacement sensing and control
US-2021340972-A1 · Nov 4, 2021 · US
Accumulator pre-charge monitoring using position sensor
US-2021332836-A1 · Oct 28, 2021 · US
Hydraulic energy recovery apparatus for working machine
US-11149753-B2 · Oct 19, 2021 · US
Accumulator pre-charge determination
US-11118605-B1 · Sep 14, 2021 · US
Hydraulic pumping system with piston displacement sensing and control
US-11098708-B2 · Aug 24, 2021 · US
Hydraulic Energy Recovery Apparatus for Working Machine
US-2021131452-A1 · May 6, 2021 · US
Hydraulic actuator and accumulator arrangement
US-10919642-B2 · Feb 16, 2021 · US
Slant mounted hydraulic pumping system
US-10760388-B2 · Sep 1, 2020 · US
Hydraulic pumping system with detection of fluid in gas volume
US-10619464-B2 · Apr 14, 2020 · US
Hydraulic accumulator health monitoring and remaining life system
US-10467881-B2 · Nov 5, 2019 · US
Hydraulic Accumulator Health Monitoring And Remaining Life System
US-2019228637-A1 · Jul 25, 2019 · US
Pressure sensor rationality diagnostic for a dual clutch transmission
US-10316963-B2 · Jun 11, 2019 · US
Pressure sensor rationality diagnostic for a dual clutch transmission
US-2018306317-A1 · Oct 25, 2018 · US
Hydraulic actuator and accumulator arrangement
US-2018222599-A1 · Aug 9, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B2201/505?
- CPC F15B2201/505 is the Cooperative Patent Classification code for “Testing of accumulators, e.g. for testing tightness.”
- How many patents are filed under CPC F15B2201/505 (Testing of accumulators, e.g. for testing tightness)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC F15B2201/505 growing?
- Publication counts under this code: 2 in 2023 vs 3 in 2025 (latest complete years).