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Blood filter

  • US 4,919,802 A
  • Filed: 11/30/1988
  • Issued: 04/24/1990
  • Est. Priority Date: 12/04/1987
  • Status: Expired due to Term
First Claim
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1. A blood filter, comprising:

  • a filter housing;

    said housing forming a bubble separating section includinga chamber defined by said housing and having a generally circular cross section for allowing bubbles to separate from blood when introduced into said chamber,a vent formed at upper end of the housing to communicate with the chamber for discharging air from said bubbles,an inlet conduit horizontally extending from the housing for introducing blood into the chamber, the axis of said inlet conduit extending substantially parallel to a tangent line of the generally circular chamber in the vicinity of the connection between the chamber and the inlet conduit, the inlet conduit axis being outside said chamber and being offset a certain distance from said tangent line in a plane perpendicular to the axis of said chamber, andsaid housing defining an inflow portion merging the inlet conduit to the chamber, andsaid housing forming a blood filter section disposed below said bubble separating section, includingan outlet disposed at a lower end of the housing for discharging blood, anda filter member disposed in said housing between the inlet conduit and the outlet,wherein said inflow portion is contoured so that said inflow portion introduced incoming blood from the inlet conduit to flow as a substantial laminar flow up to an existing swirl blood flow in the chamber, and to merge with the swirl blood flow without substantial disturbance of the swirl blood flow.

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