초록 ▼

A blood pump preferably has a magnetically suspended rotor that rotates within a housing. The rotor may rotate about a stator disposed within the housing. Radial magnetic bearings may be defined within the stator and the rotor in order to suspend the rotor. The radial magnetic bearings may be passiv

A blood pump preferably has a magnetically suspended rotor that rotates within a housing. The rotor may rotate about a stator disposed within the housing. Radial magnetic bearings may be defined within the stator and the rotor in order to suspend the rotor. The radial magnetic bearings may be passive magnetic bearings that include permanent magnets disposed within the stator and the rotor or active magnetic bearings. The pump may further include an axial magnetic bearing that may be either a passive or an active magnetic bearing. A motor that drives the rotor may be disposed within the housing in order to more easily dissipate heat generated by the motor. A primary flow path is defined between the rotor and the stator, and a secondary flow path is defined between the stator and the rotor. Preferably, a substantial majority of blood passes through the primary flow path. The secondary flow path is large enough so that it provides adequate flushing of the secondary flow path while being small enough to permit efficient operation of the radial magnet bearings across the secondary flow path.

대표청구항 ▼

1. A pump for pumping blood, comprising:a housing; a stator disposed within the housing and coupled to the housing; a rotor disposed within the housing and suspended around the stator; the rotor and stator defining a primary blood flow path between the rotor and the housing and a secondary blood flo

1. A pump for pumping blood, comprising:a housing; a stator disposed within the housing and coupled to the housing; a rotor disposed within the housing and suspended around the stator; the rotor and stator defining a primary blood flow path between the rotor and the housing and a secondary blood flow path between the rotor and the stator; at least two radial magnetic bearings for suspending the rotor between the stator and the housing, said radial magnetic bearings each comprising at least one stator suspension magnet disposed within the stator and at least one rotor suspension magnet disposed within the rotor, the stator and rotor suspension magnets communicating across the secondary flow path; and a motor for rotating the rotor with respect to the stator, said motor comprising at least one electromagnetic coil within the housing, said electromagnetic coil communicating with at least one rotor motor magnet in the rotor, said communication being across the primary flow path to rotate the rotor with respect to the stator and thereby pump blood through the pump.