Centrifuge with a fluid line guide element having a curved bearing surface

US6716154B2 · kind B2 · utility

Assignee

• Fresenius HemoCare GmbH · DE

Inventors

• Friedrich Witthaus · Namborn, DE
• Wolfram Weber · Friedrichsthal, DE

Key dates

• Filing date: Aug 27, 2002
• Grant date: Apr 6, 2004
• Expiry date: Sep 28, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B04B2005/0492
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A centrifuge having a rotating frame, which is rotatably mounted on a stationary frame, and a separation unit mounted on the rotating frame, rotating about a central axis of rotation in the same direction of rotation as the rotating frame but at twice the rotational speed. A line for supplying and/or removing a fluid is connected to the separation unit and is guided in a loop about the separation unit to a stationary tie-in point. To support the line, at least one guide element having a bearing surface for the line is provided. The bearing surface of the guide element is formed by a rotating planar curve, where the radius of the respective circle of curvature contacts the curve at a point and increases with increasing distance between the contact point and the central axis of rotation. With this contour, abrasion over the entire contact surface is largely uniform, which thereby lengthens the lifetime.