Rotary compressor
US-9512842-B2 · Dec 6, 2016 · US
Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D)
Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D) · 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 | F04C29/02 |
| Official title | Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D) |
| Display label | Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D) |
| Total patents | 785 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 38 |
| 2016 | 47 |
| 2017 | 49 |
| 2018 | 51 |
| 2019 | 71 |
| 2020 | 82 |
| 2021 | 85 |
| 2022 | 97 |
| 2023 | 88 |
| 2024 | 90 |
| 2025 | 75 |
| 2026 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oil pump, engine cover and engine comprising the same
US-9512837-B2 · Dec 6, 2016 · US
Compressor
US-2016341249-A1 · Nov 24, 2016 · US
Compressor and air conditioning apparatus using the same
US-9499760-B2 · Nov 22, 2016 · US
Compressor Having Oil-Level Sensing System
US-2016319816-A1 · Nov 3, 2016 · US
Scroll compressor having biasing system
US-9458847-B2 · Oct 4, 2016 · US
Vane rotary compressor
US-2016265531-A1 · Sep 15, 2016 · US
Compressor
US-9429156-B2 · Aug 30, 2016 · US
Permanent magnet embedded electric motor, compressor, and a refrigerating and air conditioning device
US-2016241092-A1 · Aug 18, 2016 · US
Compressor with oil separator and refrigeration device including the same
US-9410547-B2 · Aug 9, 2016 · US
Radial roller bearing, rotary machine including radial roller bearing, and method for designing radial roller bearing
US-9400016-B2 · Jul 26, 2016 · US
Oil level detecting apparatus and control method thereof, oil flow detecting apparatus and control method thereof, method for control oil return using oil level and oil flow
US-2016187173-A1 · Jun 30, 2016 · US
Compressor with a closed loop water cooling system
US-2016186757-A1 · Jun 30, 2016 · US
Compressor system with variable lubricant injection orifice
US-2016186755-A1 · Jun 30, 2016 · US
Automotive volumetric vacuum pump
US-9366256-B2 · Jun 14, 2016 · US
Vehicle
US-9358970-B2 · Jun 7, 2016 · US
Control valve for an oil-injected screw-type compressor
US-9347448-B2 · May 24, 2016 · US
Rotary compressor
US-2016131135-A1 · May 12, 2016 · US
Compressor with flooded start control
US-2016076540-A1 · Mar 17, 2016 · US
Fluid coupling drive system for a drill rig air compressor
US-2016040491-A1 · Feb 11, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C29/02?
- CPC F04C29/02 is the Cooperative Patent Classification code for “Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D).”
- How many patents are filed under CPC F04C29/02 (Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D))?
- Our database includes 785 publications tagged with this CPC code.
- Is patent activity under CPC F04C29/02 growing?
- Publication counts under this code: 90 in 2024 vs 75 in 2025 (latest complete years).