Hydraulic valve and hydraulic circuit
US-2025215906-A1 · Jul 3, 2025 · US
a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence)
a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence) · 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 | F15B13/0403 |
| Official title | {a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence)} |
| Display label | a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence) |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydraulic valve
US-2025214697-A1 · Jul 3, 2025 · US
Direct drive valve
US-2025092960-A1 · Mar 20, 2025 · US
Stability control augmentation system and method
US-12179909-B2 · Dec 31, 2024 · US
Spool valve
US-12044331-B2 · Jul 23, 2024 · US
Work machine
US-11739502-B2 · Aug 29, 2023 · US
Spool valve
US-2023140241-A1 · May 4, 2023 · US
Stability control augmentation system and method
US-2023101289-A1 · Mar 30, 2023 · US
Work Machine
US-2022333348-A1 · Oct 20, 2022 · US
Fluid pressure control device
US-11402027-B2 · Aug 2, 2022 · US
Control system for construction machinery
US-11313104-B2 · Apr 26, 2022 · US
Control valve
US-11255354-B2 · Feb 22, 2022 · US
Control system for construction machinery
US-2021324608-A1 · Oct 21, 2021 · US
Regeneration valve for a hydraulic circuit
US-11053958-B2 · Jul 6, 2021 · US
Proporational flow control valve and pilot-operated check valve integrated therewith
US-11009896-B2 · May 18, 2021 · US
Proporational Flow Control Valve and Pilot-Operated Check Valve Integrated Therewith
US-2021004026-A1 · Jan 7, 2021 · US
Hydraulic driving device of industrial vehicle
US-10816018-B2 · Oct 27, 2020 · US
Fluid pressure control device
US-2020332907-A1 · Oct 22, 2020 · US
Control valve
US-2020318747-A1 · Oct 8, 2020 · US
Regeneration valve for a hydraulic circuit
US-2020299932-A1 · Sep 24, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B13/0403?
- CPC F15B13/0403 is the Cooperative Patent Classification code for “a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence).”
- How many patents are filed under CPC F15B13/0403 (a secondary valve member sliding within the main spool, e.g. for regeneration flow (F15B13/0418 takes precedence))?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC F15B13/0403 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).