Back to results
US 6,234,772 B1Granted
Rotary blood pump
AssigneeKriton Medical, Inc.
InventorsRichard K. Wampler, David M. Lancisi
Life of this patent
Estimating the term…
Abstract
An implantable rotary sealless blood pump is provided. The pump can include hydrodynamic, magnetic and hybrid, hydrodynamic/magnetic bearings and combinations thereof. The rotor can include a shaft or the pump can be made shaftless. Close clearances may be maintained between the housing and the rotor by offsetting magnets or offsetting magnets and motor stators.
Claims26
A rotary blood pump comprising:
- a pump housing;
- a rotor within said housing and comprising an impeller;
- at least one hydrodynamic thrust bearing defined by a gap between the impeller and the housing;
- and
- at least one hydrodynamic radial bearing defined by a gap between the impeller and an extension of said housing extending towards the impeller wherein said gap between said impeller and said inward extension of said housing has a greater clearance than a clearance of said gap between said impeller and said housing of said hydrodynamic thrust bearing.
2 more elements
A rotary blood pump comprising:
- a pump housing;
- a rotor within said housing and comprising an impeller;
- at least one hydrodynamic thrust bearing defined by a gap between the impeller and the housing;
- and
- wherein an inside face of the housing and a portion of a rear face of the impeller comprise complementary shaped surfaces defining a gap with sufficient clearance such that said gap does not provide radial hydrodynamic support.
2 more elements
A rotary blood pump comprising:
- a pump housing;
- a rotor within said housing and comprising an impeller
- at least one hydrodynamic thrust bearing defined by a gap between the impeller and the housing;
- and
- at least one hydrodynamic radial bearing defined by a gap between the impeller and an inward extension of said housing, wherein radial support of said impeller is provided solely by said hydrodynamic radial bearing.
2 more elements
A shaftless rotary blood pump comprising:
- a pump housing;
- a shaftless rotor comprising an impeller;
- at least one magnetic radial bearing comprising one or more magnets carried by said impeller and one or more magnets carried by an inward extension of said housing;
- and
- at least one hydrodynamic thrust bearing defined by a gap between the impeller and the housing.
2 more elements
A shaftless rotary blood pump comprising:
- a pump housing;
- a shaftless rotor comprising an impeller;
- at least one hydrodynamic, magnetic radial bearing comprising one or more magnets carried by said impeller and one or more magnets carried by an inward extension of said housing;
- and
- at least one hydrodynamic thrust bearing defined by a gap between the impeller and the housing.
2 more elements
A shaftless rotary blood pump comprising;
- a pump housing;
- a shaftless rotor comprising an impeller;
- at least two magnetic radial bearings each comprising one or more magnets carried by said impeller and one or more magnets carried by an inward extension of said housing;
- and
- at least one hydrodynamic thrust bearing defined by a gap between the impeller and the housing.
2 more elements
Dependencies are inferred from the claim text.