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:
Jul. 31, 2007
Filed:
Jun. 24, 2004
Didier Boivin, Caluire et Cuire, FR;
Jean Farjaud, Meyzieu, FR;
Didier Boivin, Caluire et Cuire, FR;
Jean Farjaud, Meyzieu, FR;
Gambro Industries SAS, Meyzieu, FR;
Abstract
A method is provided for measuring the local hydraulic permeability, Lpi, of a sub-group of hollow fibres of a bundle of hollow fibres mounted in a tubular casing. The method comprises a step of placing the casing containing the bundle in a vertical position, the lateral opening of the casing being disposed toward the bottom, and sealing the lower end of the casing. A graduated, calibrated tube is applied in a vertical position over a portion of the upper cut surface of the bundle to form a sealed connection there between. A liquid is passed through the lateral opening of the casing at a defined flow rate, and the time required for the liquid to pass from a first graduation to a second graduation of the tube is measured. Lpi can then be calculated from the formula Lpi=V/tPSi in which; V represents the volume of the tube between the two graduations; t represents the time that the liquid takes to pass from the first graduation to the second graduation of the tube; P represents the transmembrane pressure; and Si represents the surface area of the hollow fibres belonging to the sub-group under consideration for the measurement.