Tire air filling device
US-2024375460-A1 · Nov 14, 2024 · US
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Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps (muscle-driven pumps in which the stroke is not defined by gearing F04B33/00)
Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps (muscle-driven pumps in which the stroke is not defined by gearing F04B33/00) · 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 | F04B31/00 |
| Official title | Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps (muscle-driven pumps in which the stroke is not defined by gearing F04B33/00) |
| Display label | Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps (muscle-driven pumps in which the stroke is not defined by gearing F04B33/00) |
| Total patents | 17 |
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 | 1 |
| 2016 | 1 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 3 |
| 2021 | 1 |
| 2022 | 2 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Free piston linear motor compressor and associated systems of operation
US-11466678-B2 · Oct 11, 2022 · US
Linear compressor and linear compressor control system
US-11401924-B2 · Aug 2, 2022 · US
Linear compressor and linear compressor control system
US-2021071653-A1 · Mar 11, 2021 · US
Free piston device
US-10472995-B2 · Nov 12, 2019 · US
Free piston linear motor compressor and associated systems of operation
US-10323628-B2 · Jun 18, 2019 · US
Thermal-operated pump
US-10215165-B2 · Feb 26, 2019 · US
Gas compression system for drying at least one sensor of a motor vehicle
US-2018370498-A1 · Dec 27, 2018 · US
Free piston device
US-2018179918-A1 · Jun 28, 2018 · US
Reciprocating integral linear engine compressor
US-9957958-B2 · May 1, 2018 · US
Free piston linear motor compressor and associated systems of operation
US-2018051690-A1 · Feb 22, 2018 · US
Double acting refrigeration compressor
US-9777717-B2 · Oct 3, 2017 · US
Cylinder
US-9732740-B2 · Aug 15, 2017 · US
Double-acting refrigeration compressor
US-2017211557-A1 · Jul 27, 2017 · US
Reciprocating Compressor With Integral Engine and With Linear Cylinders
US-2017167478-A1 · Jun 15, 2017 · US
Cylinder
US-2016348660-A1 · Dec 1, 2016 · US
Free piston linear motor compressor and associated systems of operation
US-2015125323-A1 · May 7, 2015 · US