Sealing gasket
US-2025369443-A1 · Dec 4, 2025 · US
Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps
Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps · 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 | F04C27/004 |
| Official title | {Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps} |
| Display label | Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gear pump with suction housing element providing a tight seal between suction and high-pressure chamber to increase pump efficiency and method of providing tight seal
US-12313071-B1 · May 27, 2025 · US
Scroll compressor including a valve plate having a surface pressure enhancement portion protruding toward an injection valve
US-12221960-B2 · Feb 11, 2025 · US
Scroll machine with injection and refrigeration system
US-12135026-B2 · Nov 5, 2024 · US
Roots pump containing rotors that capture and discharge a foreign substance
US-11976656-B2 · May 7, 2024 · US
Scroll compressor
US-2024084800-A1 · Mar 14, 2024 · US
Scroll machine with injection and refrigeration system
US-2024060493-A1 · Feb 22, 2024 · US
Scroll machine and refrigeration system
US-2024060492-A1 · Feb 22, 2024 · US
Fluid-injected compressor installation
US-11841015-B2 · Dec 12, 2023 · US
Roots pump
US-2023304497-A1 · Sep 28, 2023 · US
Scroll pump
US-2023184251-A1 · Jun 15, 2023 · US
Roots pump having a seal member with first and second projections
US-11353021-B2 · Jun 7, 2022 · US
Roots pump
US-2021340979-A1 · Nov 4, 2021 · US
Co-rotating compressor
US-11111921-B2 · Sep 7, 2021 · US
Single-screw compressor
US-11047388-B2 · Jun 29, 2021 · US
Fluid-injected compressor installation
US-2021095668-A1 · Apr 1, 2021 · US
Single-screw compressor
US-2020003212-A1 · Jan 2, 2020 · US
Rotary blower
US-2019195225-A1 · Jun 27, 2019 · US
Screw machine and method for operating the same
US-10060435-B2 · Aug 28, 2018 · US
Co-rotating compressor
US-2018223843-A1 · Aug 9, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C27/004?
- CPC F04C27/004 is the Cooperative Patent Classification code for “Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps.”
- How many patents are filed under CPC F04C27/004 (Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC F04C27/004 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).