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US 12,714,847 B2Granted
Intravascular blood pump
AssigneeAbiomed Europe GmbH
InventorsFrank Kirchhoff, Thorsten Siess, Wolfgang Kerkhoffs
Life of this patent
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Abstract
An intravascular blood pump having a rotatable shaft carrying an impeller and a housing with an opening through which the shaft extends with the impeller positioned outside the housing. The shaft and the housing have surfaces forming a circumferential gap which has a gap width of no more than 2 μm over at least part of the length of the gap and at least one of the surfaces forming the gap is made of a material having a thermal conductivity of at least 100 W/mK, in particular a ceramic material such as silicon carbide.
Claims26
An intravascular blood pump, comprising:
- a rotatable shaft carrying an impeller;
- and
- a housing having an opening, wherein the shaft extends through the opening with the impeller positioned outside the housing, the shaft and the housing having surfaces forming a circumferential gap within the opening, wherein the gap has a length and has a width of 2 μm or less over at least a part of the gap length and wherein the surface of the housing forming the gap is made of a thermally conductive material having a thermal conductivity of at least 100 W/mK.
Dependencies are inferred from the claim text.