Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1994-08-11
1995-11-28
Bertsch, Richard A.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
41747711, F04B 4308
Patent
active
054702119
ABSTRACT:
A roller pump for medical technology, in particular for pumping blood in extracorporeal circulations. The roller pump has a stator (1) with a cylindrical hollow space (2), the wall structure of which is formed as a support wall (3) for a pump tube (5) led along this wall about the central longitudinal axis of the hollow space. A pump rotor is rotatably arranged about its central longitudinal axis (4) in the pump stator, the rotor having rollers (8) which are rotatably supported on roller supports (7) and roll along the tube upon rotation of the rotor and compress the tube. The support wall (3) of the pump stator has an opening (6) with an inlet region (10) and an outlet region (12) for the tube (5) and, in these regions, this support wall deviates from the circular path of motion of the pump rollers (8) at a differing curvature along the direction as this path of motion. The support wall (3) has a continuously increasing radius of curvature in the inlet region (10) in the direction of motion of the pump rollers (8) and a continuously decreasing radius of curvature in the outlet region (12) in the direction of motion of the rollers.
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Hahn Andreas
Knott Erwin
Bertsch Richard A.
Korytnyk Peter G.
Stockert Instrumente GmbH
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