Robert J Brumfield

US Patent:

42127416, Jul 15, 1980

Filed:

Apr 10, 1978

Appl. No.:

5/895237

Inventors:

Robert C. Brumfield - Pasadena CA

International Classification:

B01D 3100
B01D 3306
A61M 103

US Classification:

210241

Abstract:

The disclosure sets forth blood processing apparatus of the general type which employs a cylindrical rotor with a semi-permeable membrane at its outer surface, rotatable within a surrounding stationary casing or housing, blood being supplied and discharged at angularly spaced loci of the casing, a secondary fluid being supplied to the interior of the rotor, effecting a cross-transfer of a component in the blood, and a secondary fluid, or a component thereof, across the membrane, sometimes referred to as a "journal machine" to distinguish such type from others which differ basically therefrom. The basic environment is like that of certain patents, identified hereinafter, and incorporates, by reference, features thereof insofar as they are applicable to the present disclosure. The improvements disclosed over such prior art include a membrane configuration and manner of supporting same, an openable housing construction and movable mount therefor, a secondary fluid communication connection with a hollow rotor shaft, an alternative form of housing peripheral configuration, and others to hereinafter appear. Also, as will subsequently appear, certain of the exemplary structural improvements provide novel operational differences resulting in novel blood processing, also contemplated within the purview thereof.

US Patent:

42116023, Jul 8, 1980

Filed:

May 4, 1978

Appl. No.:

5/902970

Inventors:

Robert C. Brumfield - Pasadena CA

International Classification:

B01D 1300
B01D 3916
B01K 100

US Classification:

156644

Abstract:

In blood dialyzers in which hollow fibers are potted in plastic tube sheets and the tube sheets are then cut to form a manifold surface providing access to the interior of the hollow fibers, blood clotting at the manifold surface is greatly reduced by treating the surface to increase the radii of the microscopic sharp edges of the fiber ends which are produced by the cutting process. The smoothing of the fiber ends can be accomplished by momentary heating, flame polishing, etching, or coating of the manifold surface with a varnish.