characterised by changing the positions of the inlet or outlet openings with respect to the working chamber

Full Title

Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids > characterised by changing the positions of the inlet or outlet openings with respect to the working chamber

Child Classifications

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• F04C 28/12 using sliding valves
• F04C 28/14 using rotating valves
• F04C 28/16 using lift valves