Vacuum pump, rotating body for vacuum pump, and method for manufacturing vacuum pump
US-2025043790-A1 · Feb 6, 2025 · US
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using priming pumps; using booster pumps to prevent vapour-lock
using priming pumps; using booster pumps to prevent vapour-lock · 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 | F04D9/04 |
| Official title | using priming pumps; using booster pumps to prevent vapour-lock |
| Display label | using priming pumps; using booster pumps to prevent vapour-lock |
| Total patents | 22 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Self-priming apparatus for quick no-water startup
US-12158166-B2 · Dec 3, 2024 · US
Driven gas-liquid separation starting device
US-12146509-B2 · Nov 19, 2024 · US
Driven gas-liquid separation starting device
US-2024287991-A1 · Aug 29, 2024 · US
Fluid pump systems
US-12071898-B2 · Aug 27, 2024 · US
Quick no-water startup apparatus for centrifugal pump
US-11905976-B2 · Feb 20, 2024 · US
Self-priming apparatus for quick no-water startup
US-2023313801-A1 · Oct 5, 2023 · US
Pneumatic type water-free starting self-priming device
US-11739755-B2 · Aug 29, 2023 · US
Quick no-water startup apparatus for centrifugal pump
US-2023265850-A1 · Aug 24, 2023 · US
Pneumatic type water-free starting self-priming device
US-2023243355-A1 · Aug 3, 2023 · US
Fluid pump systems
US-2023034465-A1 · Feb 2, 2023 · US
Quick startup device for centrifugal pump
US-11555497-B2 · Jan 17, 2023 · US
Self-priming starting device for centrifugal pump
US-11480180-B2 · Oct 25, 2022 · US
Quick startup device for centrifugal pump
US-2022325716-A1 · Oct 13, 2022 · US
Self-priming starting device for centrifugal pump
US-2022120280-A1 · Apr 21, 2022 · US
Regenerative pump start stage for high speed centrifugal fuel pump
US-10927837-B2 · Feb 23, 2021 · US
High Flow and Low NPSHr Horizontal Pump with Priming Module
US-2020309135-A1 · Oct 1, 2020 · US
Regenerative pump start stage for high speed centrifugal fuel pump
US-2018347570-A1 · Dec 6, 2018 · US
Fuel pumping unit
US-10138816-B2 · Nov 27, 2018 · US
Preconditioning flow to an electrical submersible pump
US-2017183948-A1 · Jun 29, 2017 · US