Integral Reciprocating Pump Structure Supporting Spacer Section
US-2020386221-A1 · Dec 10, 2020 · US
Crankcases
Crankcases · 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 | F04B39/128 |
| Official title | {Crankcases} |
| Display label | Crankcases |
| Total patents | 96 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 13 |
| 2017 | 11 |
| 2018 | 12 |
| 2019 | 10 |
| 2020 | 12 |
| 2021 | 8 |
| 2022 | 5 |
| 2023 | 8 |
| 2024 | 4 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluid compressor and method of operating a fluid compressor to reduce oil carryover by a compressor piston assembly
US-2020386143-A1 · Dec 10, 2020 · US
Compressor
US-10859076-B2 · Dec 8, 2020 · US
Reciprocating compressor having first and second cylinders in selective fluid communication with respective first and second suction plenums
US-10815979-B2 · Oct 27, 2020 · US
Miniature vacuum/pressure diaphragm pumps with noise mitigation boot
US-10794375-B2 · Oct 6, 2020 · US
Support for reciprocating pump
US-2020141401-A1 · May 7, 2020 · US
Seal Assembly for Reciprocating Compressor
US-2020102946-A1 · Apr 2, 2020 · US
Support for reciprocating pump
US-10520037-B2 · Dec 31, 2019 · US
Crankcase assembly for a reciprocating machine
US-10480499-B2 · Nov 19, 2019 · US
Housing for a motor or compressor
US-10458401-B2 · Oct 29, 2019 · US
Power end frame assembly for reciprocating pump
US-2019277341-A1 · Sep 12, 2019 · US
Power end frame assembly for reciprocating pump
US-10393182-B2 · Aug 27, 2019 · US
Linear compressor
US-2019226466-A1 · Jul 25, 2019 · US
Piston compressor and refrigeration system having the same
US-10309384-B2 · Jun 4, 2019 · US
Versatile housing of compressor motors
US-2019093648-A1 · Mar 28, 2019 · US
Bearing system for reciprocating pump and method of assembly
US-2019032720-A1 · Jan 31, 2019 · US
Reciprocating compressor
US-10190579-B2 · Jan 29, 2019 · US
Compressor and crankshaft-connecting rod assembly
US-10132301-B2 · Nov 20, 2018 · US
Air compressor with improved noise reduction performance
US-10087919-B2 · Oct 2, 2018 · US
Bearing system for reciprocating pump and method of assembly
US-10087992-B2 · Oct 2, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B39/128?
- CPC F04B39/128 is the Cooperative Patent Classification code for “Crankcases.”
- How many patents are filed under CPC F04B39/128 (Crankcases)?
- Our database includes 96 publications tagged with this CPC code.
- Is patent activity under CPC F04B39/128 growing?
- Publication counts under this code: 4 in 2024 vs 4 in 2025 (latest complete years).