Topological rotary engine
US-11713710-B2 · Aug 1, 2023 · US
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Admission or exhaust passages in pistons or outer members
Admission or exhaust passages in pistons or outer members · 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 | F02B55/16 |
| Official title | Admission or exhaust passages in pistons or outer members |
| Display label | Admission or exhaust passages in pistons or outer members |
| Total patents | 24 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 4 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Topological rotary engine
US-2022307413-A1 · Sep 29, 2022 · US
Rotary engine
US-11371550-B2 · Jun 28, 2022 · US
Rotary piston engine
US-11300044-B2 · Apr 12, 2022 · US
Rotary engine lubrication system using intensifier injector
US-2021355898-A1 · Nov 18, 2021 · US
Rotary engine lubrication system using intensifier injector
US-11174732-B1 · Nov 16, 2021 · US
Rotary internal combustion engine with removable subchamber insert
US-11028768-B2 · Jun 8, 2021 · US
Rotary piston engine
US-2021164387-A1 · Jun 3, 2021 · US
Rotary engine
US-2021054872-A1 · Feb 25, 2021 · US
Rotary internal combustion engine with removable subchamber insert
US-2020158011-A1 · May 21, 2020 · US
Engine assembly with multiple rotary engine stacks
US-2020102884-A1 · Apr 2, 2020 · US
Cam rotary engine power system of internal combustion type
US-2020072133-A1 · Mar 5, 2020 · US
Rotary internal combustion engine with removable subchamber insert
US-10544732-B2 · Jan 28, 2020 · US
Rotary internal combustion engine
US-10138804-B2 · Nov 27, 2018 · US
Internal combustion engine with split pilot injection
US-10041402-B2 · Aug 7, 2018 · US
Rotary internal combustion engine with exhaust purge
US-9926842-B2 · Mar 27, 2018 · US
Rotary internal combustion engine
US-2018045110-A1 · Feb 15, 2018 · US
Rotary internal combustion engine with variable volumetric compression ratio
US-9828906-B2 · Nov 28, 2017 · US
Internal combustion engine with split pilot injection
US-2017328274-A1 · Nov 16, 2017 · US
Rotary internal combustion engine with variable volumetric compression ratio
US-2017074160-A1 · Mar 16, 2017 · US