Packing seal assembly
US-12560156-B2 · Feb 24, 2026 · US
Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00)
Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00) · 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 | F04B27/00 |
| Official title | Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00) |
| Display label | Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00) |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Packing seal assembly
US-2025264095-A1 · Aug 21, 2025 · US
Packing seal assembly
US-12305628-B2 · May 20, 2025 · US
Packing seal assembly
US-2024218865-A1 · Jul 4, 2024 · US
Single piece valve plate assembly for a reciprocating compressor, the valve plate assembly including a valve plate and a suction valve retainer that are integrally formed as a unitary body
US-12018665-B2 · Jun 25, 2024 · US
Packing seal assembly
US-11946465-B2 · Apr 2, 2024 · US
Fluid end with clamped retention
US-11920583-B2 · Mar 5, 2024 · US
Packing seal assembly
US-2023047066-A1 · Feb 16, 2023 · US
Reciprocating compressor for use with an economizer
US-2023039145-A1 · Feb 9, 2023 · US
Compressor control method, control apparatus and control system
US-11486384-B2 · Nov 1, 2022 · US
Fluid end with clamped retention
US-2022282720-A1 · Sep 8, 2022 · US
Cooling block for multi-cylinder air compressor
US-11333140-B2 · May 17, 2022 · US
Single piece valve plate assembly for a reciprocating compressor, the valve plate assembly including a valve plate and a suction valve retainer that are integrally formed as a unitary body
US-2021388828-A1 · Dec 16, 2021 · US
Compressor Control Method, Control Apparatus and Control System
US-2021277885-A1 · Sep 9, 2021 · US
Single piece valve plate assembly for a reciprocating compressor
US-11105326-B2 · Aug 31, 2021 · US
Cylinder head assembly for a reciprocating compressor including a cylinder head with an integral valve plate
US-10920762-B2 · Feb 16, 2021 · US
Cooling Block For Multi-Cylinder Air Compressor
US-2020392951-A1 · Dec 17, 2020 · US
Variable-capacity compressor, two-stage compression system and control method thereof
US-10247449-B2 · Apr 2, 2019 · US
Compressor
US-10087918-B2 · Oct 2, 2018 · US
Variable-Capacity Compressor, Two-Stage Compression System and Control Method Thereof
US-2018274822-A1 · Sep 27, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B27/00?
- CPC F04B27/00 is the Cooperative Patent Classification code for “Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00).”
- How many patents are filed under CPC F04B27/00 (Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders (multi-stage pumps specially adapted for elastic fluids F04B25/00))?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC F04B27/00 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).