Hydro excavation vacuum apparatus and fluid storage and supply systems thereof
US-12385215-B2 · Aug 12, 2025 · US
supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
supply of fluid to the pump by gravity through a hopper, e.g. without intake valve · 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 | F04B15/023 |
| Official title | {supply of fluid to the pump by gravity through a hopper, e.g. without intake valve} |
| Display label | supply of fluid to the pump by gravity through a hopper, e.g. without intake valve |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 8 |
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vacuum excavation apparatus having a deceleration vessel and methods for excavating a site
US-12276080-B2 · Apr 15, 2025 · US
Computer-aided method and device for optimized control of the delivery rate of a concrete pump or the like
US-12085070-B2 · Sep 10, 2024 · US
Operation monitoring for a thick matter conveying system
US-2024295132-A1 · Sep 5, 2024 · US
Hydro excavation vacuum apparatus
US-12077936-B2 · Sep 3, 2024 · US
Airlocks for conveying material, hydro excavation vacuum apparatus having airlocks, and methods for hydro excavating a site
US-11905677-B2 · Feb 20, 2024 · US
Method for Operating a Construction-Material And/or Viscous-Material Pump for Conveying Construction Material And/or Viscous Material, and Construction-Material And/or Viscous-Material Pump for Conveying Construction Material And/or Viscous Material
US-2023265843-A1 · Aug 24, 2023 · US
Vacuum excavation apparatus having a deceleration vessel and methods for excavating a site
US-2023030715-A1 · Feb 2, 2023 · US
Method for Operating a High-Density Solids Pump and High-Density Solids Pump
US-2023026231-A1 · Jan 26, 2023 · US
Hydro excavation vacuum apparatus having an adjustment system for adjusting a dewatering system screen
US-11560689-B2 · Jan 24, 2023 · US
Hydro excavation vacuum apparatus having deceleration vessels and methods for hydro excavating a site
US-11499290-B2 · Nov 15, 2022 · US
Material sprayer
US-11440038-B2 · Sep 13, 2022 · US
Switching device for a concrete pump
US-2022275793-A1 · Sep 1, 2022 · US
Thick material pump
US-11255317-B2 · Feb 22, 2022 · US
Hydraulic drive system for a construction material pump, and construction material pump
US-11231054-B2 · Jan 25, 2022 · US
Hydro excavation vacuum apparatus and fluid storage and supply systems thereof
US-2021332554-A1 · Oct 28, 2021 · US
Hydro excavation vacuum apparatus and fluid storage and supply systems thereof
US-11085171-B2 · Aug 10, 2021 · US
Hydraulic Drive System for a Construction Material Pump, and Construction Material Pump
US-2021164497-A1 · Jun 3, 2021 · US
Pulsation-free wet spraying machine
US-2021010372-A1 · Jan 14, 2021 · US
Pulsation-free wet spraying machine
US-2020355077-A1 · Nov 12, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B15/023?
- CPC F04B15/023 is the Cooperative Patent Classification code for “supply of fluid to the pump by gravity through a hopper, e.g. without intake valve.”
- How many patents are filed under CPC F04B15/023 (supply of fluid to the pump by gravity through a hopper, e.g. without intake valve)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC F04B15/023 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).