Gear pump or gear motor
US-2025207585-A1 · Jun 26, 2025 · US
Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement · 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 | F04C2/088 |
| Official title | {Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement} |
| Display label | Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement |
| Total patents | 48 |
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 | 7 |
| 2016 | 5 |
| 2017 | 7 |
| 2018 | 10 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gear pump with floating bearing with receiver faces
US-11852142-B2 · Dec 26, 2023 · US
Gear pump
US-2022074408-A1 · Mar 10, 2022 · US
Pump with bleed mechanism for reducing cavitation
US-11149729-B2 · Oct 19, 2021 · US
Gear pump for venting trapped volume
US-11028847-B2 · Jun 8, 2021 · US
Multi-phase pump with cooled liquid reservoir
US-10962002-B2 · Mar 30, 2021 · US
Internal gear pump
US-10890180-B2 · Jan 12, 2021 · US
Gear pump for venting trapped volume
US-2020277952-A1 · Sep 3, 2020 · US
Oil pump
US-2020191142-A1 · Jun 18, 2020 · US
Reduction of cavitation in gear pumps
US-10634135-B2 · Apr 28, 2020 · US
Gear pump
US-10563653-B2 · Feb 18, 2020 · US
Oil pump
US-2020032789-A1 · Jan 30, 2020 · US
Shape memory alloy coating using additive manufacturing
US-2020023431-A1 · Jan 23, 2020 · US
Gerotor assembly having an oil groove
US-10480507-B2 · Nov 19, 2019 · US
Gears and gear pumps
US-10443597-B2 · Oct 15, 2019 · US
Oil pump
US-2019178246-A1 · Jun 13, 2019 · US
Internal gear pump
US-2019032653-A1 · Jan 31, 2019 · US
Pump with bleed mechanism for reducing cavitation
US-2019024657-A1 · Jan 24, 2019 · US
Oil pump having extension portions that reduce the effect of #the collapse of bubbles in the oil
US-10174757-B2 · Jan 8, 2019 · US
Reduction of cavitation in gear pumps
US-2018372091-A1 · Dec 27, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C2/088?
- CPC F04C2/088 is the Cooperative Patent Classification code for “Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement.”
- How many patents are filed under CPC F04C2/088 (Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC F04C2/088 growing?
- Publication counts under this code: 1 in 2023 vs 1 in 2025 (latest complete years).