CPC Subgroup
F04C 28/18 characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C28/10)
Full Title
Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids > characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C28/10)
3 direct subcodes
Child Classifications
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- F04C 28/20 by changing the form of the inner or outer contour of the working chamber
- F04C 28/22 by changing the eccentricity between cooperating members