초록 ▼

A centrifugal fluid pump assembly includes a housing having fluid inlet and outlet ports and an impeller having magnetic pieces disposed therein and accommodated for rotation in the housing for feeding the fluid, typically blood by a centrifugal force developed during rotation. A rotational torque g

A centrifugal fluid pump assembly includes a housing having fluid inlet and outlet ports and an impeller having magnetic pieces disposed therein and accommodated for rotation in the housing for feeding the fluid, typically blood by a centrifugal force developed during rotation. A rotational torque generating mechanism including a rotor having magnets for attracting the magnetic pieces in the impeller and a motor for rotating the rotor serves to impart a rotational torque to the impeller in a non-contact relationship for thereby rotating the impeller. The impeller has vanes which define radially outwardly extending fluid passages therebetween. The magnetic pieces are embedded in the vanes.

대표청구항 ▼

[ We claim:] [1.] A centrifugal blood pump assembly comprising:a generally cylindrical housing adapted to receive blood, said housing having a blood inlet port extending from near a center of an upper surface of the generally cylindrical housing in a substantially vertical direction and a blood outl

[ We claim:] [1.] A centrifugal blood pump assembly comprising:a generally cylindrical housing adapted to receive blood, said housing having a blood inlet port extending from near a center of an upper surface of the generally cylindrical housing in a substantially vertical direction and a blood outlet port projecting from a side surface of the generally cylindrical housing in a tangential direction,an impeller having pieces of magnetic material disposed therein and accommodated for rotation in said housing for feeding blood by a centrifugal force developed during rotation of the impeller, anda rotational torque generating mechanism comprising a rotor having a magnet for attracting the pieces of magnetic material in said impeller and a motor for rotating said rotor, said rotational torque generating mechanism serving to impart a rotational torque to said impeller in a non-contact relationship for thereby rotating said impeller,said impeller including a disc-shaped lower shroud defining a lower surface, and an annular plate-shaped upper shroud defining an upper surface, the impeller defining a center opening and including a plurality of vanes defining a corresponding plurality of blood passages disposed between adjacent vanes, said blood passages each extending from the center opening to an outer periphery of the impeller and being closed along upper and lower sides thereof by the upper and lower shrouds, respectively, each of at least two of the vanes forming a magnetic material store space, said pieces of magnetic material being embedded in respective ones of the at least two vanes and completely surrounded by the material of said vanes so that said pieces of magnetic material are not exposed at a surface of the impeller.