The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 1995
Filed:
Aug. 11, 1994
Erwin Knott, Poing, DE;
Andreas Hahn, Sauerlach, DE;
Stockert Instrumente GmbH, Munich, DE;
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.