Hydraulic valve assembly
US-12467481-B2 · Nov 11, 2025 · US
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with special provision for automatic return
with special provision for automatic return · 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 | F15B11/15 |
| Official title | with special provision for automatic return |
| Display label | with special provision for automatic return |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 4 |
| 2019 | 4 |
| 2020 | 2 |
| 2021 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydraulic valve assembly
US-2024044344-A1 · Feb 8, 2024 · US
Pressurized gas engine and method of operating a pressurized gas engine
US-11751885-B2 · Sep 12, 2023 · US
Pressurized gas engine and method of operating a pressurized gas engine
US-2021137548-A1 · May 13, 2021 · US
Hydraulic circuit with controlled recirculation circuit
US-10920798-B2 · Feb 16, 2021 · US
Control of variable gravity driven hydraulic loads
US-10662621-B2 · May 26, 2020 · US
System and methods for controlled lowering and lifting of a load
US-10533304-B2 · Jan 14, 2020 · US
Control of variable gravity driven hydraulic loads
US-2019145083-A1 · May 16, 2019 · US
Reversible flow path construction
US-10273651-B2 · Apr 30, 2019 · US
Forklift, hydraulic cylinder assembly and hydraulic device thereof
US-10253790-B2 · Apr 9, 2019 · US
Flow control valve for construction equipment, having floating function
US-10208456-B2 · Feb 19, 2019 · US
Fluid pressure control device
US-2018282974-A1 · Oct 4, 2018 · US
Hydraulic metering system for downhole hydraulic actuation
US-2018274328-A1 · Sep 27, 2018 · US
Hydraulic circuit with controlled recirculation circuit
US-2018128289-A1 · May 10, 2018 · US
Reversible Flow Path Construction
US-2018058043-A1 · Mar 1, 2018 · US
Hydraulic drive
US-9541101-B2 · Jan 10, 2017 · US
Flow control valve for construction equipment, having floating function
US-2016251831-A1 · Sep 1, 2016 · US
Forklift, hydraulic cylinder assembly and hydraulic device thereof
US-2016245313-A1 · Aug 25, 2016 · US
Hydraulic drive
US-2015040555-A1 · Feb 12, 2015 · US