Rotary blood pump

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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F04B 17/00 (2006.01)

Patent

CA 2636418

A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the' blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.

La présente invention concerne une pompe sanguine rotative comprenant un boîtier définissant une chambre de pompage. Cette chambre de pompage comporte une arrivée de sang et une sortie de sang tangentielle. Au moins un des stators de moteur est fourni à l~extérieur de la chambre de pompage. Une turbine rotative se trouve dans la chambre de pompage ; elle est conçue pour faire entrer le sang dans la chambre de pompage afin de s~acheminer vers la sortie du sang. Elle comprend au moins une région magnétique. Elle est radialement contrainte en rotation par couplage magnétique à au moins un des stators de moteur, et axialement contrainte en rotation par au moins une surface de butée hydrodynamique sur la turbine.

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