Axial pump with adjustable impeller
US-12504027-B2 · Dec 23, 2025 · US
by adjusting the clearances between rotary and stationary parts
by adjusting the clearances between rotary and stationary parts · 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 | F04D29/642 |
| Official title | {by adjusting the clearances between rotary and stationary parts} |
| Display label | by adjusting the clearances between rotary and stationary parts |
| Total patents | 33 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 9 |
| 2021 | 2 |
| 2022 | 1 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Axial pump with adjustable impeller
US-2025012296-A1 · Jan 9, 2025 · US
Water active turbine clearance control
US-2024410314-A1 · Dec 12, 2024 · US
Axial pump with adjustable impeller
US-12104618-B2 · Oct 1, 2024 · US
Vacuum pump
US-2024280115-A1 · Aug 22, 2024 · US
Axial pump with adjustable impeller
US-2024141926-A1 · May 2, 2024 · US
Apparatus for adjusting clearance and gas turbine including the same
US-11242765-B2 · Feb 8, 2022 · US
Apparatus for adjusting clearance and gas turbine including the same
US-2021040863-A1 · Feb 11, 2021 · US
Preload force tool
US-2021018387-A1 · Jan 21, 2021 · US
Alignment tool for installing a diffuser in an air cycle machine
US-10487853-B2 · Nov 26, 2019 · US
High compressor build clearance reduction
US-10443543-B2 · Oct 15, 2019 · US
System for the active setting of a radial clearance size and aircraft engine with a system for the active setting of a radial clearance size
US-10428675-B2 · Oct 1, 2019 · US
Method and apparatus for active clearance control
US-10393149-B2 · Aug 27, 2019 · US
Compact advanced passive tip clearance control
US-10344612-B2 · Jul 9, 2019 · US
Active clearance control for axial rotor systems
US-10323536-B2 · Jun 18, 2019 · US
Rotor tip clearance
US-10294811-B2 · May 21, 2019 · US
Guide device for variable pitch stator vanes of a turbine engine, and a method of assembling such a device
US-10280941-B2 · May 7, 2019 · US
Shroud wear ring for a work vehicle
US-10174481-B2 · Jan 8, 2019 · US
High compressor build clearance reduction
US-2018230946-A1 · Aug 16, 2018 · US
Compact advanced passive tip clearance control
US-2018202306-A1 · Jul 19, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/642?
- CPC F04D29/642 is the Cooperative Patent Classification code for “by adjusting the clearances between rotary and stationary parts.”
- How many patents are filed under CPC F04D29/642 (by adjusting the clearances between rotary and stationary parts)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/642 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).