Rotary internal combustion engine with unequal volumetric ratios
US-11261781-B2 · Mar 1, 2022 · US
This page is not indexed by search engines while we improve data quality.
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C20/10)
characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C20/10) · 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 | F01C20/18 |
| Official title | characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C20/10) |
| Display label | characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C20/10) |
| Total patents | 13 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Control device to achieve variable compression ratio for triangle rotary engine
US-10995618-B2 · May 4, 2021 · US
Rotary internal combustion engine with unequal volumetric ratios
US-2020123970-A1 · Apr 23, 2020 · US
Variable displacement oil pump
US-2020109709-A1 · Apr 9, 2020 · US
Rotary internal combustion engine with unequal volumetric ratios
US-10526961-B2 · Jan 7, 2020 · US
Pump device
US-2019277280-A1 · Sep 12, 2019 · US
Variable delivery external gear machine
US-10393114-B2 · Aug 27, 2019 · US
Control device to achieve variable compression ratio for triangle rotary engine
US-2019010806-A1 · Jan 10, 2019 · US
Rotary internal combustion engine with unequal volumetric ratios
US-2018223728-A1 · Aug 9, 2018 · US
Vane pump with multiple control chambers
US-9534597-B2 · Jan 3, 2017 · US
Variable delivery external gear machine
US-2016369795-A1 · Dec 22, 2016 · US
Vane Pump With Multiple Control Chambers
US-2015369240-A1 · Dec 24, 2015 · US
Vane pump with multiple control chambers
US-9181803-B2 · Nov 10, 2015 · US