Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane
US-RE50855-E · Apr 7, 2026 · US
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of rigid material
of rigid material · 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 | F04C27/002 |
| Official title | {of rigid material} |
| Display label | of rigid material |
| Total patents | 22 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2018 | 4 |
| 2019 | 1 |
| 2020 | 2 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Scroll compressor
US-2026028986-A1 · Jan 29, 2026 · US
Screw compressor
US-2026022701-A1 · Jan 22, 2026 · US
Vacuum pump
US-2025361865-A1 · Nov 27, 2025 · US
Vacuum pump
US-12385489-B2 · Aug 12, 2025 · US
Non-lubricated compressor with abradable sealing element and related method for assembling it
US-12345262-B2 · Jul 1, 2025 · US
Non-lubricated compressor with abradable sealing element and related method for assembling it
US-2024426300-A1 · Dec 26, 2024 · US
Scroll pump with a plurality of bellows sealing a plurality of adjustment members
US-12025128-B2 · Jul 2, 2024 · US
Roots pump containing rotors that capture and discharge a foreign substance
US-11976656-B2 · May 7, 2024 · US
Vacuum pump
US-2023313803-A1 · Oct 5, 2023 · US
Roots pump
US-2023304497-A1 · Sep 28, 2023 · US
Scroll pump
US-2023184251-A1 · Jun 15, 2023 · US
Tip seal for scroll compressor
US-11536269-B2 · Dec 27, 2022 · US
Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane
US-10767649-B2 · Sep 8, 2020 · US
Variable diffuser with axially translating end wall for a centrifugal compressor
US-10753370-B2 · Aug 25, 2020 · US
Tip seal for scroll compressor
US-2019353162-A1 · Nov 21, 2019 · US
Variable diffuser with axially translating end wall for a centrifugal compressor
US-2018340549-A1 · Nov 29, 2018 · US
Hermetic compressor
US-2018187680-A1 · Jul 5, 2018 · US
Refrigerant scroll compressor for motor vehicle air conditioning system including at least one sealing means for bottom surface sealing of orbiting scroll
US-9945380-B2 · Apr 17, 2018 · US
Rotary compressor and refrigerating cycle apparatus
US-9879675-B2 · Jan 30, 2018 · US