Method to determine the reasonable design area of rotor profile of roots pump and its application
US-11168682-B2 · Nov 9, 2021 · US
Toothed wheels
Toothed wheels · 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 | F04C18/084 |
| Official title | {Toothed wheels} |
| Display label | Toothed wheels |
| Total patents | 115 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 9 |
| 2017 | 6 |
| 2018 | 9 |
| 2019 | 20 |
| 2020 | 4 |
| 2021 | 9 |
| 2022 | 10 |
| 2023 | 8 |
| 2024 | 22 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hybrid profile supercharger rotors
US-11131307-B2 · Sep 28, 2021 · US
Rotor Structure of Screw Compressor and Inverter Screw Compressor With Same
US-2021277898-A1 · Sep 9, 2021 · US
Oil-cooled screw compressor
US-11009025-B2 · May 18, 2021 · US
Method to determine the reasonable design area of rotor profile of roots pump and its application
US-2021115918-A1 · Apr 22, 2021 · US
Multi-stage compressor unit and method for adjusting the rotational speed of the motors
US-2021102554-A1 · Apr 8, 2021 · US
Electric pump device and mounting structure of electric pump
US-2020309130-A1 · Oct 1, 2020 · US
Motor-driven roots pump
US-10738778-B2 · Aug 11, 2020 · US
Screw compressor
US-2020200171-A1 · Jun 25, 2020 · US
Cylindrical symmetric volumetric machine
US-2020088192-A1 · Mar 19, 2020 · US
Rotor for a positive displacement compressor
US-10514036-B2 · Dec 24, 2019 · US
Optimized helix angle rotors for roots-style supercharger
US-2019383287-A1 · Dec 19, 2019 · US
Multi-stage rotary lobe pump
US-2019376515-A1 · Dec 12, 2019 · US
Fluid machine with helically lobed rotors
US-2019331113-A1 · Oct 31, 2019 · US
Screw rotor with high lobe count
US-10436196-B2 · Oct 8, 2019 · US
Optimized helix angle rotors for roots-style supercharger
US-10436197-B2 · Oct 8, 2019 · US
Screw rotor processing method and screw rotor lead correction calculation device
US-2019283207-A1 · Sep 19, 2019 · US
Vacuum-pump rotor
US-2019264686-A1 · Aug 29, 2019 · US
System for monitoring machine fluids by measuring fluctuations in a magnetic field
US-10379082-B2 · Aug 13, 2019 · US
Assembly of Screws for a Screw Compressor for a Utility Vehicle
US-2019241169-A1 · Aug 8, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C18/084?
- CPC F04C18/084 is the Cooperative Patent Classification code for “Toothed wheels.”
- How many patents are filed under CPC F04C18/084 (Toothed wheels)?
- Our database includes 115 publications tagged with this CPC code.
- Is patent activity under CPC F04C18/084 growing?
- Publication counts under this code: 22 in 2024 vs 10 in 2025 (latest complete years).