Apex and face seals with rotary internal combustion engine
US-9850758-B2 · Dec 26, 2017 · US
of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member · 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 | F01C1/22 |
| Official title | of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member |
| Display label | of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member |
| Total patents | 286 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 21 |
| 2016 | 30 |
| 2017 | 30 |
| 2018 | 46 |
| 2019 | 30 |
| 2020 | 41 |
| 2021 | 25 |
| 2022 | 8 |
| 2023 | 8 |
| 2024 | 25 |
| 2025 | 20 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary internal combustion engine with variable volumetric compression ratio
US-9828906-B2 · Nov 28, 2017 · US
Compound engine system with rotary engine
US-2017335762-A1 · Nov 23, 2017 · US
Internal combustion engine with port communication
US-9714604-B2 · Jul 25, 2017 · US
Rotary engine
US-2017184016-A1 · Jun 29, 2017 · US
Gerotor hydraulic device with adjustable output
US-9644481-B2 · May 9, 2017 · US
Rotary internal combustion engine with variable volumetric compression ratio
US-2017074160-A1 · Mar 16, 2017 · US
Stop control system for direct-injection type internal combustion engine
US-2017074192-A1 · Mar 16, 2017 · US
Rotary internal combustion engine with variable volumetric compression ratio
US-9540992-B2 · Jan 10, 2017 · US
Auxiliary power unit with intercooler
US-2016376021-A1 · Dec 29, 2016 · US
Compound engine assembly with direct drive of generator
US-2016376023-A1 · Dec 29, 2016 · US
Compound engine assembly with bleed air
US-2016376981-A1 · Dec 29, 2016 · US
Rotary internal combustion engine with pilot subchamber
US-9528434-B1 · Dec 27, 2016 · US
Compound engine assembly with exhaust pipe nozzle
US-2016369693-A1 · Dec 22, 2016 · US
Compound cycle engine
US-9512721-B2 · Dec 6, 2016 · US
Internal combustion engine with pilot and main injection
US-2016298530-A1 · Oct 13, 2016 · US
Rotary piston engine including a piston assembly, vehicle including the rotary piston engine and a manufacturing method for the piston assembly
US-9441485-B2 · Sep 13, 2016 · US
Structurally efficient cooled engine housing for rotary engines
US-9435204-B2 · Sep 6, 2016 · US
Rotary internal combustion engine with removable subchamber insert
US-2016252010-A1 · Sep 1, 2016 · US
Compound engine assembly with confined fire zone
US-2016245185-A1 · Aug 25, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01C1/22?
- CPC F01C1/22 is the Cooperative Patent Classification code for “of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member.”
- How many patents are filed under CPC F01C1/22 (of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member)?
- Our database includes 286 publications tagged with this CPC code.
- Is patent activity under CPC F01C1/22 growing?
- Publication counts under this code: 25 in 2024 vs 20 in 2025 (latest complete years).