Drug delivery device comprising an adjustment member
US-2021283340-A1 · Sep 16, 2021 · US
Spacing or clearance between cylinder and piston
Spacing or clearance between cylinder and piston · 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 | F04B53/008 |
| Official title | {Spacing or clearance between cylinder and piston} |
| Display label | Spacing or clearance between cylinder and piston |
| Total patents | 86 |
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 | 6 |
| 2016 | 8 |
| 2017 | 7 |
| 2018 | 19 |
| 2019 | 11 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 11 |
| 2023 | 2 |
| 2024 | 7 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston pump
US-2021148319-A1 · May 20, 2021 · US
Linear compressor
US-10968907-B2 · Apr 6, 2021 · US
Linear compressor
US-10890169-B2 · Jan 12, 2021 · US
Reciprocating compressor having a gas bearing
US-10837434-B2 · Nov 17, 2020 · US
Method for operating a linear compressor
US-10830230-B2 · Nov 10, 2020 · US
Piston arrangement for pumping a liquid
US-10788032-B2 · Sep 29, 2020 · US
Piston pump comprising a piston with a profiled front face
US-10781814-B2 · Sep 22, 2020 · US
Detecting fluid leaks in pressurized systems of waterjet cutting systems
US-10620079-B2 · Apr 14, 2020 · US
Foreign material removal device
US-2019359180-A1 · Nov 28, 2019 · US
Systems and methods for operating a linear motor to prevent impacts with hard stops
US-10487632-B2 · Nov 26, 2019 · US
Bidirectional piston seals with pressure compensation
US-10480298-B2 · Nov 19, 2019 · US
Foreign material removal device
US-10436186-B2 · Oct 8, 2019 · US
High pressure fuel pump
US-10385845-B2 · Aug 20, 2019 · US
Pump unit for reducing agents in an exhaust gas purification system
US-10378528-B2 · Aug 13, 2019 · US
Linear compressor
US-10352313-B2 · Jul 16, 2019 · US
Flow restrictor and gas compressor
US-2019186671-A1 · Jun 20, 2019 · US
Flow restrictor and gas compressor
US-10288063-B2 · May 14, 2019 · US
High pressure pump
US-10273921-B2 · Apr 30, 2019 · US
Systems and methods for operating a linear motor to prevent impacts with hard stops
US-10233735-B2 · Mar 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B53/008?
- CPC F04B53/008 is the Cooperative Patent Classification code for “Spacing or clearance between cylinder and piston.”
- How many patents are filed under CPC F04B53/008 (Spacing or clearance between cylinder and piston)?
- Our database includes 86 publications tagged with this CPC code.
- Is patent activity under CPC F04B53/008 growing?
- Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).