Fluid end assembly
US-12416305-B2 · Sep 16, 2025 · US
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having self-acting distribution members, i.e. actuated by working fluid
having self-acting distribution members, i.e. actuated by working fluid · 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 | F04B1/18 |
| Official title | having self-acting distribution members, i.e. actuated by working fluid |
| Display label | having self-acting distribution members, i.e. actuated by working fluid |
| Total patents | 21 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 1 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluid end assembly
US-12410789-B2 · Sep 9, 2025 · US
Fluid end assembly
US-2025223962-A1 · Jul 10, 2025 · US
Fluid end assembly
US-12286969-B2 · Apr 29, 2025 · US
Fluid end assembly
US-2025075697-A1 · Mar 6, 2025 · US
Fluid end assembly
US-2024426294-A1 · Dec 26, 2024 · US
Fluid end assembly
US-12152582-B2 · Nov 26, 2024 · US
Fluid end assembly
US-2023287882-A1 · Sep 14, 2023 · US
Fluid end assembly
US-11655812-B2 · May 23, 2023 · US
Fluid end assembly
US-2023116452-A1 · Apr 13, 2023 · US
Fluid end assembly
US-11536267-B2 · Dec 27, 2022 · US
Fluid end assembly
US-2022372972-A1 · Nov 24, 2022 · US
Fluid end assembly
US-11408419-B2 · Aug 9, 2022 · US
Fluid End Assembly
US-2021215154-A1 · Jul 15, 2021 · US
Fluid end assembly
US-10962001-B2 · Mar 30, 2021 · US
Fluid End Assembly
US-2020300240-A1 · Sep 24, 2020 · US
Fluid End Assembly
US-2020284253-A1 · Sep 10, 2020 · US
Fluid end assembly
US-10670013-B2 · Jun 2, 2020 · US
Fluid End Assembly
US-2019017503-A1 · Jan 17, 2019 · US
Electric-powered pump
US-9599100-B2 · Mar 21, 2017 · US