Filter for obtaining plasma or plasma water

US4789473A · kind A · utility

Assignee

• Fresenius AG · DE

Inventors

• Bernd Mathieu · Spiesen, DE
• Wolfram Weber · Friedrichsthal, DE
• Wolfgang Schulz · Wunstorf, DE

Key dates

• Filing date: Jan 8, 1987
• Grant date: Dec 6, 1988
• Expiry date: Jan 8, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C70/845
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter comprising a filter housing with an interior within which between two closure members filter membranes in the form of hollow fibers are disposed. Between the hollow fibers a free flow space remains to which are connected two connecting pieces disposed inclined on the housing. Through said connecting pieces blood is supplied to the interior so that a filtration from the outside to the inside into the hollow fibers is possible. This and the arrangement of the connecting pieces gives an extremely favourable flow approach to the hollow fibers so that the blood flow is hardly influenced in its velocity and flow behaviour because in addition to the cross-section of the free flow space is adapted to the cross section of the blood supply line. For making such a filter at least two filters are arranged parallel and spaced apart in a plane, the support surface for the filters being rotatably mounted and the axis of rotation not intersecting any of the two longitudinal axes of the filters. During the rotation and supplying of the casting or sealing compound for the closure members through end-face supply means into the interior inclined faces are formed which in their angle correspon…