Spring washer for a variable flow rate valve mechanism
US-11519290-B2 · Dec 6, 2022 · US
Belleville-type springs (friction-clutch diaphragm springs F16D13/583)
Belleville-type springs (friction-clutch diaphragm springs F16D13/583) · 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 | F16F1/32 |
| Official title | Belleville-type springs (friction-clutch diaphragm springs F16D13/583) |
| Display label | Belleville-type springs (friction-clutch diaphragm springs F16D13/583) |
| Total patents | 84 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 4 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 9 |
| 2020 | 8 |
| 2021 | 12 |
| 2022 | 13 |
| 2023 | 8 |
| 2024 | 5 |
| 2025 | 7 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vibration Isolator Pre-Load Mechanism
US-2022299084-A1 · Sep 22, 2022 · US
Wave spring
US-11396921-B2 · Jul 26, 2022 · US
Vibration isolation for rotating machines
US-2022196111-A1 · Jun 23, 2022 · US
Pedal force simulator device
US-11332109-B2 · May 17, 2022 · US
Vibration isolator with flexible housing
US-2022145958-A1 · May 12, 2022 · US
Vehicle seat assembly incorporating quasi-zero/negative stiffness vibration isolators
US-2022144152-A1 · May 12, 2022 · US
Connection system for a well string
US-11319758-B2 · May 3, 2022 · US
Wastegate assembly
US-11313271-B2 · Apr 26, 2022 · US
Retention flange for power tool
US-2022063047-A1 · Mar 3, 2022 · US
Airflow intake configuration in power tool
US-2022063080-A1 · Mar 3, 2022 · US
Disc spring, disc spring device, and method for manufacturing disc spring
US-2021396292-A1 · Dec 23, 2021 · US
Vibration isolator with series and/or parallel conical disc spring member arrangements
US-11137045-B2 · Oct 5, 2021 · US
Pedal force simulator device
US-2021291797-A1 · Sep 23, 2021 · US
Connector
US-11118651-B2 · Sep 14, 2021 · US
Conical spring washer, transmission system, and method of assembly thereof
US-11060578-B2 · Jul 13, 2021 · US
Valve device for a turbocharger
US-11047296-B2 · Jun 29, 2021 · US
Plate spring member
US-2021115993-A1 · Apr 22, 2021 · US
Wastegate assembly
US-2021087968-A1 · Mar 25, 2021 · US
Turbocharger with variable-nozzle cartridge, including resilient heat shield assembly to locate the cartridge axially
US-10927698-B2 · Feb 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16F1/32?
- CPC F16F1/32 is the Cooperative Patent Classification code for “Belleville-type springs (friction-clutch diaphragm springs F16D13/583).”
- How many patents are filed under CPC F16F1/32 (Belleville-type springs (friction-clutch diaphragm springs F16D13/583))?
- Our database includes 84 publications tagged with this CPC code.
- Is patent activity under CPC F16F1/32 growing?
- Publication counts under this code: 5 in 2024 vs 7 in 2025 (latest complete years).