Viscous coupling
US-11619273-B1 · Apr 4, 2023 · US
actuated by valves
actuated by 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 | F16D35/021 |
| Official title | {actuated by valves} |
| Display label | actuated by valves |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 8 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 1 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydrodynamic friction clutch
US-11125280-B2 · Sep 21, 2021 · US
Apparatus employing shear forces to transmit energy having flow altering structures configured to increase heat rejection from a working fluid and related method
US-10619682-B2 · Apr 14, 2020 · US
Hydrodynamic friction clutch
US-2020096056-A1 · Mar 26, 2020 · US
Viscous fluid shear device having fluid channel(s) formed in floating wiper
US-10563708-B2 · Feb 18, 2020 · US
Apparatus Employing Shear Forces To Transmit Energy Having Flow Altering Structures Configured To Increase Heat Rejection From A Working Fluid And Related Method
US-2019293130-A1 · Sep 26, 2019 · US
Apparatus employing shear forces to transmit energy having flow altering structures configured to increase heat rejection from a working fluid and related method
US-10364852-B2 · Jul 30, 2019 · US
Auxiliary drive device
US-10340769-B2 · Jul 2, 2019 · US
Viscous fluid shear device having fluid channel(s) formed in floating wiper
US-2018291969-A1 · Oct 11, 2018 · US
Bimetal coil assembly for fan drive
US-9856924-B2 · Jan 2, 2018 · US
External control type fluid coupling
US-2017370477-A1 · Dec 28, 2017 · US
Fluid friction clutch
US-2017335901-A1 · Nov 23, 2017 · US
Bimetal activated viscous clutch with wiper on clutch disk
US-9664238-B2 · May 30, 2017 · US
Apparatus employing shear forces to transmit energy having flow altering structures configured to increase heat rejection from a working fluid and related method
US-2017130783-A1 · May 11, 2017 · US
Auxiliary drive device
US-2017077784-A1 · Mar 16, 2017 · US
Liquid Cooled Fan Clutch
US-2016377127-A1 · Dec 29, 2016 · US
Apparatus employing shear forces to transmit energy having flow altering structures configured to increase heat rejection from a working fluid and related method
US-9470278-B1 · Oct 18, 2016 · US
Bimetal coil assembly for fan drive
US-2016238088-A1 · Aug 18, 2016 · US
Variable channel type fan clutch
US-9381903-B2 · Jul 5, 2016 · US
Viscous clutch with high-speed wiper system
US-2016108973-A1 · Apr 21, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16D35/021?
- CPC F16D35/021 is the Cooperative Patent Classification code for “actuated by valves.”
- How many patents are filed under CPC F16D35/021 (actuated by valves)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC F16D35/021 growing?
- Publication counts under this code: 1 in 2021 vs 1 in 2023 (latest complete years).