Scroll compressor having back pressure chamber that operatively contains a discharge pressure and an intermediate pressure during different periods of time within a single compression cycle
US-9523361-B2 · Dec 20, 2016 · US
Mechanical Engineering
Mechanical Engineering · 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 | F04C27/005 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 438 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 35 |
| 2016 | 37 |
| 2017 | 41 |
| 2018 | 35 |
| 2019 | 50 |
| 2020 | 42 |
| 2021 | 51 |
| 2022 | 29 |
| 2023 | 38 |
| 2024 | 41 |
| 2025 | 34 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Internal gear pump
US-9506467-B2 · Nov 29, 2016 · US
Scroll compressor
US-2016319818-A1 · Nov 3, 2016 · US
Scroll compressor having biasing system
US-9458847-B2 · Oct 4, 2016 · US
Vacuum pump
US-2016265532-A1 · Sep 15, 2016 · US
Scroll pump having axially compliant spring element
US-9429020-B2 · Aug 30, 2016 · US
Scroll member and scroll-type fluid machine
US-2016238007-A1 · Aug 18, 2016 · US
Scroll compressor and processing method of scroll including a projection on a tip seal and a hole in a tip seal groove
US-9366253-B2 · Jun 14, 2016 · US
Scroll pump having axially compliant spring element
US-9360013-B2 · Jun 7, 2016 · US
Differential pressure regulating valve and motor-driven compressor having differential pressure regulating valve
US-9360012-B2 · Jun 7, 2016 · US
Scroll pump
US-9353746-B2 · May 31, 2016 · US
Scroll pump having tip seal containing engaging portions intermediate nonengaging portions that interface with a scroll base
US-9353748-B2 · May 31, 2016 · US
Scroll vacuum pump and method of maintenance including replacing a tip seal of a scroll vacuum pump
US-9341186-B2 · May 17, 2016 · US
Tip seal
US-2016131136-A1 · May 12, 2016 · US
Scroll compressor with thrust sliding surface oiling groove
US-9316225-B2 · Apr 19, 2016 · US
Scroll compressor
US-2016102665-A1 · Apr 14, 2016 · US
Scroll compressor
US-2016102667-A1 · Apr 14, 2016 · US
Compressor having capacity modulation assembly
US-9303642-B2 · Apr 5, 2016 · US
Scroll compressor
US-2016090986-A1 · Mar 31, 2016 · US
Scroll compressor with back pressure chamber
US-9297383-B2 · Mar 29, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C27/005?
- CPC F04C27/005 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F04C27/005 (Mechanical Engineering)?
- Our database includes 438 publications tagged with this CPC code.
- Is patent activity under CPC F04C27/005 growing?
- Publication counts under this code: 41 in 2024 vs 34 in 2025 (latest complete years).