Rotary screw compressor
US-12523227-B2 · Jan 13, 2026 · US
having more than two rotary pistons with parallel axes
having more than two rotary pistons with parallel axes · 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 | F04C18/165 |
| Official title | {having more than two rotary pistons with parallel axes} |
| Display label | having more than two rotary pistons with parallel axes |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 6 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Scavenge loss limiter for a rotary compressor
US-2025264103-A1 · Aug 21, 2025 · US
Screw pump with a tapered suction-side section and a pressure-side section with a decreasing clearance
US-12378961-B2 · Aug 5, 2025 · US
Rotor assembly, compressor and air conditioner
US-12305641-B2 · May 20, 2025 · US
Scavenge loss limiter for a rotary compressor
US-12215692-B1 · Feb 4, 2025 · US
Screw pump, screw rotor, method of manufacturing a screw rotor, and use of a screw pump or a screw rotor
US-2024328419-A1 · Oct 3, 2024 · US
Compressor with two rotors coaxially disposed on a connecting assembly sleeved on the shaft that limits relative movement between them
US-12098720-B2 · Sep 24, 2024 · US
Rotor unit assembly
US-11994031-B2 · May 28, 2024 · US
Rotor Assembly, Compressor and Air Conditioner
US-2024084802-A1 · Mar 14, 2024 · US
Compressor and Air Conditioner
US-2024035471-A1 · Feb 1, 2024 · US
Rotor unit assembly
US-2024003255-A1 · Jan 4, 2024 · US
Screw compressor
US-11802563-B2 · Oct 31, 2023 · US
Screw compressor
US-2022349404-A1 · Nov 3, 2022 · US
Rotary screw compressor
US-2022316480-A1 · Oct 6, 2022 · US
Rotary screw compressor rotor having work extraction mechanism
US-11359632-B2 · Jun 14, 2022 · US
Fluid machine with helically lobed rotors
US-11268512-B2 · Mar 8, 2022 · US
Oil separator
US-11020697-B2 · Jun 1, 2021 · US
Multi-stage rotary piston pump
US-2021140430-A1 · May 13, 2021 · US
Method for modifying performance of rotor profile by adjusting meshing line segments
US-10883496-B2 · Jan 5, 2021 · US
Screw compressor for HVAC
US-10876768-B2 · Dec 29, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C18/165?
- CPC F04C18/165 is the Cooperative Patent Classification code for “having more than two rotary pistons with parallel axes.”
- How many patents are filed under CPC F04C18/165 (having more than two rotary pistons with parallel axes)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC F04C18/165 growing?
- Publication counts under this code: 6 in 2024 vs 4 in 2025 (latest complete years).