Piston-valve engagement in fluid sprayers
US-11371492-B2 · Jun 28, 2022 · US
Cylinders
Cylinders · 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 | F04B1/143 |
| Official title | Cylinders |
| Display label | Cylinders |
| Total patents | 70 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 11 |
| 2017 | 11 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hydraulic fan drive
US-2022082104-A1 · Mar 17, 2022 · US
Hydrostatic Axial Piston Machine of Swash Plate Construction
US-2022074396-A1 · Mar 10, 2022 · US
Linear compressor
US-2021396224-A1 · Dec 23, 2021 · US
Pump having a unitary body
US-11187214-B2 · Nov 30, 2021 · US
Linear hydraulic pump for submersible applications
US-11118582-B2 · Sep 14, 2021 · US
Reciprocating pumps having a pivoting arm
US-11035348-B2 · Jun 15, 2021 · US
Ultra-long stroke multi-cylinder reciprocating pump
US-2021079901-A1 · Mar 18, 2021 · US
Plunger pump
US-10907597-B2 · Feb 2, 2021 · US
Axial-piston motor and cyclic process device
US-10781801-B2 · Sep 22, 2020 · US
Variable displacement pump-motor
US-10738757-B2 · Aug 11, 2020 · US
Axial piston machine
US-10669983-B2 · Jun 2, 2020 · US
Electro hydrostatic actuators
US-10611464-B2 · Apr 7, 2020 · US
Hydraulic pump-motor
US-10598146-B2 · Mar 24, 2020 · US
Pump assemblies and pumping systems incorporating pump assemblies
US-2020072201-A1 · Mar 5, 2020 · US
Axial-piston motor and cyclic process device
US-2020011306-A1 · Jan 9, 2020 · US
Piston-valve engagement in fluid sprayers
US-2019368476-A1 · Dec 5, 2019 · US
Linear Hydraulic Pump for Submersible Applications
US-2019323499-A1 · Oct 24, 2019 · US
Plunger pump
US-2019301413-A1 · Oct 3, 2019 · US
Piston engaging with valve for self-priming in fluid sprayers
US-10422325-B2 · Sep 24, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B1/143?
- CPC F04B1/143 is the Cooperative Patent Classification code for “Cylinders.”
- How many patents are filed under CPC F04B1/143 (Cylinders)?
- Our database includes 70 publications tagged with this CPC code.
- Is patent activity under CPC F04B1/143 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).