Liquid pumping apparatus

Abstract

A liquid pumping apparatus comprising a rotor housing, a rotor having at least one roller, to be rotated by a prime mover, an inner periphery wall of the rotor housing, a flexible tube to be inserted into a gap formed between the rotor and the inner periphery wall and squeezed when the rotor is rotated so as to transfer a liquid fed into the tube, and a deformable guide for guiding the flexible tube in a moving path of the roller. At least one portion of the inner periphery wall is movable so as to approach or separate from the rotor.

Dependencies are inferred from the claim text.