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. 08, 1983
Filed:
Jan. 12, 1981
Zane H Geel, Concord, CA (US);
Roger B Hornby, Walnut Creek, CA (US);
Bennie J Lipps, Walnut Creek, CA (US);
Charles E Savage, Clayton, CA (US);
Pierre Vanat, Clayton, CA (US);
Cordis Dow Corp., Miami, FL (US);
Abstract
A hollow fiber medical separatory device of the type including a shell containing a plurality of hollow semipermeable fibers extending through a central dialysate chamber and terminating in spaced apart blood chambers; the device is improved by tubesheets at each end of the fibers having the shape of a frustum of a cone and sized such that the fibers fill the cone to the peripheral edge at the outer end planar surface of the frustum; and a multi-functional blood chamber means forming a blood chamber by pressure sealing engagement with the outer tapered surface of the cone and also pressure sealed to the outer end surface of the shell to prevent air ingress into the dialysate chamber during testing or use. The invention also includes a method for potting the frusto-conical tubesheets on the end portions of the fibers while the fibers are positioned in the shell which is improved by the use of steps and means to insure centering of the fibers in the cone during centrifugal casting of the resin.