Patent ID: 9562529
Date: 2017-02-07
CPC Classifications: A61M,F04B,F04D

Claim:
1. A tube roller pump for a medical device for extracorporeal blood treatment, comprising: a pump housing including a curved running surface and a rotor that is rotatable within the running surface, wherein a tube segment is adapted to be placed between the running surface and the rotor, and the rotor is adapted to be attached via a shaft reception means to a drive shaft of the tube roller pump, and wherein at least one locking element is provided for axially locking and/or rotationally coupling the rotor to the drive shaft, wherein the rotor has provided thereon: a geometry of the shaft reception means is configured such that the rotor is adapted to be guided to a first predetermined rotary position relative to the drive shaft, when it is axially pushed onto the drive shaft, and that, at this first predetermined rotary position, the first locking element is adapted to be moved by the drive shaft from a locking position to a release position, whereby the rotor, when pushed further onto the drive shaft, is adapted to be moved to a second, axially defined position at which the first locking element is adapted to be moved back to the locking position, and the second locking element is adapted to be brought into engagement with the drive shaft such that a torque is transmitted from the drive shaft to the rotor; wherein the drive shaft and the shaft reception means both have slide geometries sliding along one another, when the rotor, while being axially pushed onto the drive shaft, is guided to the first position relative to the drive shaft; and wherein the slide geometry of the shaft reception means is defined by two triangular plates, which are formed on an inner wall of the shaft reception means and have inner surfaces that extend parallel to an axis of rotation of the rotor and are arranged in an opposed relationship with one another, and wherein a tip of each of these triangular plates points in the direction of a bottom of the rotor.