Multi-stage shaft seal
US-12510187-B2 · Dec 30, 2025 · US
with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28)
with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28) · 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 | F16K3/22 |
| Official title | with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28) |
| Display label | with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28) |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-stage shaft seal
US-2024401717-A1 · Dec 5, 2024 · US
Electrically Operated Gas Flow Regulating Valve
US-2023115783-A1 · Apr 13, 2023 · US
Electrically operated gas flow regulating valve
US-11466790-B2 · Oct 11, 2022 · US
Pressure-reduction devices for fluid systems
US-11261975-B2 · Mar 1, 2022 · US
Electrically Operated Gas Flow Regulating Valve
US-2022042618-A1 · Feb 10, 2022 · US
Fluid flow control valve equipped with a conical flap and system comprising such valve
US-11236831-B2 · Feb 1, 2022 · US
Pressure-reduction devices for fluid systems
US-2021348689-A1 · Nov 11, 2021 · US
Valve flap assembly, valve arrangement, exhaust system, and vehicle
US-2021131385-A1 · May 6, 2021 · US
Polygon wire ring for retaining an internal component of a valve to an external component thereof
US-10774968-B2 · Sep 15, 2020 · US
Polygon Wire Ring For Retaining An Internal Component Of A Valve To An External Component Thereof
US-2020240563-A1 · Jul 30, 2020 · US
Intake device for internal combustion engine
US-2020191066-A1 · Jun 18, 2020 · US
Valve device
US-10539100-B2 · Jan 21, 2020 · US
Valve connector for integral high pressure cylinder unloader valve
US-10352320-B2 · Jul 16, 2019 · US
Valve with integral piston
US-10329876-B2 · Jun 25, 2019 · US
Valve device
US-2019078538-A1 · Mar 14, 2019 · US
Anti-rotation assemblies for use with fluid valves
US-10221961-B2 · Mar 5, 2019 · US
Valve plugs having curved notches
US-10161528-B2 · Dec 25, 2018 · US
Variable flow rate valve mechanism and turbocharger
US-2018320581-A1 · Nov 8, 2018 · US
Slit valve apparatus, systems, and methods
US-10023954-B2 · Jul 17, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16K3/22?
- CPC F16K3/22 is the Cooperative Patent Classification code for “with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28).”
- How many patents are filed under CPC F16K3/22 (with sealing faces shaped as surfaces of solids of revolution (F16K13/02 takes precedence; with resilient valve members F16K3/28))?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC F16K3/22 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).