Rotary blood pump

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/10 (2006.01)

Patent

CA 2579637

Various "contactless" bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing (110) defining a pumping chamber (112). The housing has a spindle (130) extending into the pumping chamber. A spindle magnet assembly (160) includes first and second magnets (262,264) disposed within the spindle. The first and second magnets are arranged proximate each other with their respective magnetic vectors opposing each other. The lack of mechanical contact bearings enables longer life pump operation and less damage to working fluids such as blood.

divers mécanismes de palier sans contact comprenant des paliers hydrodynamiques et magnétiques sont destinés à une pompe rotative comme alternative à des paliers à contact mécanique. Dans un mode de réalisation de l'invention, un dispositif de pompe comprend un boîtier de pompe (110) définissant une chambre de pompage (112). Ce boîtier possède un rotor (160) s'étendant dans la chambre de pompage. Un ensemble aimant de rotor (160) comprend un premier et un second aimant (262,264) placés à l'intérieur du rotor. Le premier et le second aimant sont agencés à proximité d'un de l'autre avec leur vecteur magnétique respectif s'opposant entre eux. L'absence de palier à contact mécanique permet d'obtenir une durée de vie de pont supérieure et une dégradation des fluides de travail, tel que du sang, moindre.

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