Capstan-driven air pump system for opening and closing a longitudinal railcar door
US-11649744-B2 · May 16, 2023 · US
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the auxiliary valve being actuated by the working motor-piston or piston-rod
the auxiliary valve being actuated by the working motor-piston or piston-rod · 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 | F01L25/063 |
| Official title | {the auxiliary valve being actuated by the working motor-piston or piston-rod} |
| Display label | the auxiliary valve being actuated by the working motor-piston or piston-rod |
| Total patents | 2 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears stable based on the most recent years.
| Year | Patents |
|---|---|
| 2017 | 1 |
| 2023 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.