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:
Jun. 07, 1983
Filed:
Jul. 16, 1981
Alfred P Mulzet, Endicott, NY (US);
International Business Machines Corporation, Endicott, NY (US);
Abstract
A centrifuge assembly useful for two stage blood platelet separation by counterflow comprising a channeled rotor assembly and a fluid container disposed in the channel, whereby the centrifugal separation effects in the fluid container are determined by the geometry of the channel in thr rotor. The fluid container is preferably formed from semirigid plastic material and is considered a disposable item, discarded after a single use. The rotor assembly preferably includes a removable filler piece or center piece formed from a single piece of material and having therein an open-topped channel having dimensions appropriate to receive the semirigid container, which is suitably curved and placed in the channel. Fluid connections are provided from a multi-chambered cavity attached to the ends of the container to an axially located multichannel rotating seal. The channel is divided into two distinct circular portions, the first portion of the channel being spiral-like and the second portion having a plurality of radiuses, each measured from a different center. The spiral increases radially outward from its juncture of the first stage and the second stage. A transition section connects the two portions, and forms a spillway between the two portions.