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Springy variable displacement piston pump

Inspired by [pashute]'s Servo powered permamagnet motor
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The rotor has magnets spaced around it, the same pole facing towards the outside. As the rotor magnets move past a piston, they repel the piston due to its embedded magnet.

The distance between the piston and the rotor can be adjusted by supporting the piston with some adjustable- location magnets, which repel some piston-embedded magnets added for this purpose.

Changing this distance adjusts the stroke length of the pump.

For use as a pump you can use way valves.

If you use cams to control the valves you can run it as a hydraulic motor or as a pump.

caspian, Jul 12 2015

Illustration http://www.sockstar...ent-piston-pump.png
[caspian, Jul 12 2015]

Servo powered permamagnet motor Servo_20powered_20permamagnet_20motor
Inspiration for this idea [caspian, Jul 12 2015]

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