Spring brake actuator and retaining device for such spring brake actuator
US-12559082-B2 · Feb 24, 2026 · US
for releasing a normally applied brake
for releasing a normally applied brake · 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 | F16D2121/10 |
| Official title | for releasing a normally applied brake |
| Display label | for releasing a normally applied brake |
| Total patents | 36 |
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 | 2 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Braking System and Braking System Provision Method
US-2026022748-A1 · Jan 22, 2026 · US
Fluid valve
US-12305765-B2 · May 20, 2025 · US
Brake Actuator
US-2024159283-A1 · May 16, 2024 · US
Fluid valve
US-2024142005-A1 · May 2, 2024 · US
Electropneumatic parking brake arrangement having a shut-off valve and method for controlling an electronically controlled pneumatic brake system
US-11858483-B2 · Jan 2, 2024 · US
Sealing assembly for a spring brake actuator
US-11814023-B2 · Nov 14, 2023 · US
Brake system
US-11731601-B2 · Aug 22, 2023 · US
Air Brake System Having an Improved Anti-Compounding Function
US-2023007848-A1 · Jan 12, 2023 · US
Spring brake actuator and retaining device for such spring brake actuator
US-2023001911-A1 · Jan 5, 2023 · US
Parking brake apparatus and method for a vehicle power unit to which a vehicle towed unit can be connected
US-11390260-B2 · Jul 19, 2022 · US
Sealing assembly for a spring brake actuator
US-2022063580-A1 · Mar 3, 2022 · US
Parking brake apparatus and method for a vehicle power unit to which a vehicle towed unit can be connected
US-2022048490-A1 · Feb 17, 2022 · US
Electropneumatic parking brake arrangement having a shut-off valve and method for controlling an electronically controlled pneumatic brake system
US-2021284115-A1 · Sep 16, 2021 · US
Brake cylinder with parking brake mechanism
US-11059469-B2 · Jul 13, 2021 · US
Brake system
US-2021146901-A1 · May 20, 2021 · US
Brake actuator using fluid bladder or bladders as fluid chambers
US-11001244-B1 · May 11, 2021 · US
Brake Cylinder with Parking Brake Mechanism
US-2020346629-A1 · Nov 5, 2020 · US
Pivotable actuator mounting device
US-10767715-B2 · Sep 8, 2020 · US
Brake device
US-10648524-B2 · May 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16D2121/10?
- CPC F16D2121/10 is the Cooperative Patent Classification code for “for releasing a normally applied brake.”
- How many patents are filed under CPC F16D2121/10 (for releasing a normally applied brake)?
- Our database includes 36 publications tagged with this CPC code.
- Is patent activity under CPC F16D2121/10 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).