Extracorporeal circuit blood filter
AssigneesJohnson & Johnson, Purolator, Inc.
InventorHerman Charles Mouwen
Life of this patent
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Abstract
An improved extracorporeal circuit blood filter of the type using filter media in the form of a cartridge wherein the improvement comprises an internal bypass directly through the cartridge. The bypass is actuated should the filter media become blocked.
Claims1
An extracorporeal blood filter comprising an assembly for supporting a cartridge filter media in a housing fixedly securable to said assembly, said housing having an inlet in the top portion thereof for receiving unfiltered blood, said assembly for supporting the filter cartridge comprising a bottom member attached to the bottom of said housing, said bottom member having a blood outlet located substantially in the center of said bottom member, a hollow, permeable, cylindrical core extending upwardly within the housing from said bottom member to a top cap, filter media contained within the housing and extending from the top cap to the bottom member and about the periphery of the core, said top cap having an opening substantially in the center of said top cap, a valve member seated in said opening, a rotatable shaft mounted in the housing, a portion of said shaft being offset from the major axis of the shaft, said offset portion being connected to the valve member, and means for rotating the shaft whereby the valve member is lifted upwardly and away from the opening in the top cap and blood is allowed to flow directly through the hollow core to the blood outlet.
Dependencies are inferred from the claim text.