Automatic Air Bleeding System For Hydraulics
US-2021285470-A1 · Sep 16, 2021 · US
the pilot valves being sliding valves
the pilot valves being sliding valves · 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 | F15B13/0435 |
| Official title | {the pilot valves being sliding valves} |
| Display label | the pilot valves being sliding valves |
| Total patents | 103 |
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 | 3 |
| 2016 | 3 |
| 2017 | 11 |
| 2018 | 6 |
| 2019 | 10 |
| 2020 | 22 |
| 2021 | 17 |
| 2022 | 10 |
| 2023 | 10 |
| 2024 | 6 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Servo valve assembly
US-2021108735-A1 · Apr 15, 2021 · US
Fluid valve
US-2021048111-A1 · Feb 18, 2021 · US
Electrohydraulic valve and method for producing the electrohydraulic valve
US-10900388-B2 · Jan 26, 2021 · US
Direct input pilot operated servo valve
US-10900502-B2 · Jan 26, 2021 · US
Proportional Flow Control and Counterbalance Valve Having Single Seat Configuration
US-2020393856-A1 · Dec 17, 2020 · US
Closed center pressure flow control valve
US-10865905-B2 · Dec 15, 2020 · US
Leakage modulation in hydraulic systems containing a three-way spool valve
US-10844884-B2 · Nov 24, 2020 · US
Spool servo valve
US-2020309163-A1 · Oct 1, 2020 · US
Spool servo valve
US-2020309284-A1 · Oct 1, 2020 · US
Pilot Device for a Directional Valve without Internal Cable Connections
US-2020309162-A1 · Oct 1, 2020 · US
Valve solenoid tube having a two chamber configuration
US-10781934-B2 · Sep 22, 2020 · US
Servo valve
US-10767778-B2 · Sep 8, 2020 · US
Hydraulic cylinder spool valve device
US-10753376-B2 · Aug 25, 2020 · US
Closed loop and/or open loop control method for an electropneumatic field device
US-10711810-B2 · Jul 14, 2020 · US
Servovalve
US-10683943-B2 · Jun 16, 2020 · US
Proportional Valve for Fluid Flow Control and Generation of Load-Sense Signal
US-2020182371-A1 · Jun 11, 2020 · US
Servo valve
US-2020166152-A1 · May 28, 2020 · US
Servo valve
US-2020166153-A1 · May 28, 2020 · US
Proportional valve for fluid flow control and generation of load-sense signal
US-10662979-B1 · May 26, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B13/0435?
- CPC F15B13/0435 is the Cooperative Patent Classification code for “the pilot valves being sliding valves.”
- How many patents are filed under CPC F15B13/0435 (the pilot valves being sliding valves)?
- Our database includes 103 publications tagged with this CPC code.
- Is patent activity under CPC F15B13/0435 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).