The main components of the pump are the cam surface and the rotor. The rotor contains splines to drive the radial slots of the shaft. The rotor rotates inside the cam ring. Each radial slot contains a blade, which can slide freely into or out of the slot due to centrifugal force. The blade is designed to cooperate with the surface of the cam ring when the rotor rotates. The cam ring axis is offset to the drive shaft axis. When the rotor rotates, centrifugal force pushes the blades towards the surface of the cam ring. The blade divides the space between the rotor and the cam ring into a series of small chambers. During the first half of the rotor rotation, the volume of these chambers increases, resulting in a decrease in pressure.

This is a pumping process that causes fluid to flow through the inlet. In the second half of the rotor's rotation, the cam ring pushes the blade back into the slot, thereby reducing the amount of stagnation. This will definitely expel the captured fluid through the outlet. In this type of pump, all pump action takes place in the chamber on the side of the rotor and shaft, therefore, the design of the pump is unbalanced. The delivery speed of the pump depends on the eccentricity of the rotor relative to the cam ring.

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