External gear pump
US-2018347561-A1 · Dec 6, 2018 · US
Equalization of pressure pulses (silencing for compressors F04C29/06)
Equalization of pressure pulses (silencing for compressors F04C29/06) · 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 | F04C15/0049 |
| Official title | {Equalization of pressure pulses (silencing for compressors F04C29/06)} |
| Display label | Equalization of pressure pulses (silencing for compressors F04C29/06) |
| Total patents | 129 |
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 | 18 |
| 2016 | 11 |
| 2017 | 14 |
| 2018 | 18 |
| 2019 | 11 |
| 2020 | 10 |
| 2021 | 12 |
| 2022 | 6 |
| 2023 | 16 |
| 2024 | 10 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pump device
US-10087917-B2 · Oct 2, 2018 · US
High-Pressure Fuel Pump for a Fuel Injection System
US-2018258892-A1 · Sep 13, 2018 · US
Low-pulse vane pumps
US-10018197-B2 · Jul 10, 2018 · US
Pump
US-2018163722-A1 · Jun 14, 2018 · US
Pump device
US-2018149153-A1 · May 31, 2018 · US
Fuel pump
US-2018112659-A1 · Apr 26, 2018 · US
Aerodynamic pressure pulsation dampener
US-9951761-B2 · Apr 24, 2018 · US
Vane spacing for a variable displacement oil pump
US-2018106252-A1 · Apr 19, 2018 · US
Oil pump
US-2018106251-A1 · Apr 19, 2018 · US
Vane oil pump
US-9920666-B2 · Mar 20, 2018 · US
Gerotor pump for a vehicle
US-9909583-B2 · Mar 6, 2018 · US
Vane pump
US-9897086-B2 · Feb 20, 2018 · US
Pump apparatus and marine vessel propelling machine
US-9885355-B2 · Feb 6, 2018 · US
Gerotor pump for a vehicle
US-9879672-B2 · Jan 30, 2018 · US
Vane oil pump
US-9874210-B2 · Jan 23, 2018 · US
Fuel pump and manufacturing method thereof
US-2018010607-A1 · Jan 11, 2018 · US
Sliding Vane Type Compressor and Exhaust Structure Thereof
US-2017342982-A1 · Nov 30, 2017 · US
Gear Pump
US-2017335846-A1 · Nov 23, 2017 · US
Variable displacement vane pump
US-2017276132-A1 · Sep 28, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C15/0049?
- CPC F04C15/0049 is the Cooperative Patent Classification code for “Equalization of pressure pulses (silencing for compressors F04C29/06).”
- How many patents are filed under CPC F04C15/0049 (Equalization of pressure pulses (silencing for compressors F04C29/06))?
- Our database includes 129 publications tagged with this CPC code.
- Is patent activity under CPC F04C15/0049 growing?
- Publication counts under this code: 10 in 2024 vs 3 in 2025 (latest complete years).