Patent ID: 9709051
Date: 2017-07-18
CPC Classifications: F04B

Claim:
1. A tube pump comprising: a tube through which fluid is flowed; a housing member comprising a cylindrical chamber in which the tube is accommodated, the cylindrical chamber including an inner peripheral surface along which the tube is arranged; a rotator comprising a first shaft and a first portion provided on the first shaft, the first portion including a guide having first and second ends, the first end positioned a first distance from the first shaft, the second end positioned a second distance from the first shaft, the second distance being greater than the first distance; a roller having a first shank received by the guide, the roller configured to selectively press the tube to deform the tube; and a contact member having a contact portion formed by a bottom surface of the cylindrical chamber extending outwardly towards the inner peripheral surface at least the first distance and less than the second distance, the contact portion being configured to selectively contact the roller.