Air compressor
US-11193477-B2 · Dec 7, 2021 · US
with two cylinders
with two cylinders · 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 | F04B27/005 |
| Official title | {with two cylinders} |
| Display label | with two cylinders |
| Total patents | 99 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 7 |
| 2017 | 10 |
| 2018 | 10 |
| 2019 | 10 |
| 2020 | 12 |
| 2021 | 12 |
| 2022 | 11 |
| 2023 | 9 |
| 2024 | 4 |
| 2025 | 9 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Reciprocating compressor and control method therefor
US-11143177-B2 · Oct 12, 2021 · US
Control Method of Compressor and Refrigerant Circulation System
US-2021301812-A1 · Sep 30, 2021 · US
Compressor Cylinder Switching Control Method and Device, Unit and Air Conditioning System
US-2021270260-A1 · Sep 2, 2021 · US
Three-stage compression air pump
US-2021254610-A1 · Aug 19, 2021 · US
High-pressure positive displacement plunger pump
US-11022106-B2 · Jun 1, 2021 · US
Compressor for discharging a medium
US-10968906-B2 · Apr 6, 2021 · US
Cooling Block For Multi-Cylinder Air Compressor
US-2020392951-A1 · Dec 17, 2020 · US
Double-piston compressor of a compressed-air supply device
US-10859075-B2 · Dec 8, 2020 · US
Variable pressure air pump
US-10815981-B2 · Oct 27, 2020 · US
System And Method For Multi-Level Vacuum Generation And Storage
US-2020325882-A1 · Oct 15, 2020 · US
Rolling cylinder displacement compressor
US-10801483-B2 · Oct 13, 2020 · US
Method for operating a piston compressor, and piston compressor
US-2020309116-A1 · Oct 1, 2020 · US
Method of control of compressors with more than two capacity states
US-10788030-B2 · Sep 29, 2020 · US
Reciprocating-piston machine, compressed-air supply installation, compressed-air supply system, and vehicle
US-10704542-B2 · Jul 7, 2020 · US
Reciprocating-piston machine, compressed-air supply installation, compressed-air supply system, and vehicle having a compressed-air supply installation
US-10641257-B2 · May 5, 2020 · US
Connector for a compressor assembly
US-10578086-B2 · Mar 3, 2020 · US
Rolling cylinder displacement compressor
US-2020056600-A1 · Feb 20, 2020 · US
Variable Pressure Air Pump
US-2020056601-A1 · Feb 20, 2020 · US
Gm cryocooler and method of operating gm cryocooler
US-2019316574-A1 · Oct 17, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B27/005?
- CPC F04B27/005 is the Cooperative Patent Classification code for “with two cylinders.”
- How many patents are filed under CPC F04B27/005 (with two cylinders)?
- Our database includes 99 publications tagged with this CPC code.
- Is patent activity under CPC F04B27/005 growing?
- Publication counts under this code: 4 in 2024 vs 9 in 2025 (latest complete years).