Peristaltic pumps

A peristaltic pump comprising:

• a drivable rotor having at least one pressing member;
• a housing comprising a cylindrical stator in which the rotor is rotatable;
• flexible tubing having an inlet side and an outlet side, the flexible tubing extending circumferentially around the stator against an inner wall;
• a radially deformable ring positioned between the rotor and the circumferentially extending flexible tubing, the ring being deformable by the at least one pressing member upon rotation of the rotor to compress the flexible tubing against the inner wall of the cylindrical stator to thereby convey liquid along the flexible tubing;
• wherein the inlet side and the outlet side of the flexible tubing are arranged side-by-side so that the flexible tubing extends in a substantially radial direction outwardly away from the cylindrical stator;
• wherein the radially deformable ring includes a ring anchor projecting radially outwardly in a radial direction from the radially deformable ring and is located between the inlet side and the outlet side of the flexible tubing;
• characterised in that:
• the ring anchor is mounted to the housing to secure the ring anchor to the housing whilst allowing reciprocal movement of the ring anchor in the radial direction.