To eliminate the conventional inconvenience that a secondary blood flow around an impeller is pushed aside in the same direction as a main blood flow passing through the center of the impeller, a blood passage needs the supply of comparatively large energy, and an auxiliary blade set causes thrombus formation and/or hematolysis within a pump.
An axial flow rotary type blood pump includes an impeller 5 composed so as to be magnetically rotated by the interaction of a magnet arranged on the impeller or within it and a stator arranged on the housing or within it within a housing. The stator is arranged with offsetting in a shaft direction from the magnet and the impeller is provided with a main shaft, a backing ring, two or more estranged blades 4 which extend between this backing ring and the main shaft, and a fluid type bearing 3 on the backing ring 2 which exerts working at least in a shaft direction and in a radius direction about the rotation axis of the impeller. The fluid type bearing is provided with at least two fluid type bearings on the backing ring and a channel formed between these fluid type bearings.
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COOK MARTIN CHRISTOPHER
WOODARD JOHN CAMPBELL
| JP2002349482A | 2002-12-04 | |||
| JP2002070780A | 2002-03-08 |
| US5370509A | 1994-12-06 | |||
| US6527699B1 | 2003-03-04 |
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro