Patents Assigned to Polystan A/S
  • Blood pump
    Patent number: 4239464
    Abstract: Blood pump comprising an inlet valve, an outlet valve, and a displacement chamber being portions of a common flexible tubing being squeezable between fixed wall means and two spaced, movable valve plungers and a displacement plunger arranged on the portion of the tubing therebetween, wherein the valve plungers in the flow direction of the tubing have a dimension exceeding 5 mm and that in the tubing, with the valve plungers in closed position, a slot is left with a height less than 0.5 mm.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: December 16, 1980
    Assignee: Polystan A/S
    Inventor: Lars Hein