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US 11,911,274 B2Granted
Artificial heart valves incorporating negative poisson's ratio materials
OwnerJoon Bu Parkinventor
Life of this patent
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Abstract
An artificial heart valve includes a frame, one or more struts attached to the frame, and a leaflet configured to open and close a fluid flow path through the frame by moving in response to heartbeats. Movement of the leaflet is restricted by the one or more struts. The leaflet includes an inner leaflet body having a negative Poisson's ratio, and an outer leaflet body at least partially surrounding the inner leaflet body, the outer leaflet body having a positive Poisson's ratio.
Claims15
An artificial heart valve comprising:
- a frame;
- one or more struts attached to the frame;
- and
- a leaflet configured to open and close a fluid flow path through the frame by moving in response to heartbeats, wherein movement of the leaflet is restricted by the one or more struts, and
- wherein the leaflet comprises
- an inner leaflet body having a negative Poisson's ratio, wherein the inner leaflet body comprises a carbon structure having the negative Poisson ratio, and
- an outer leaflet body at least partially surrounding the inner leaflet body, the outer leaflet body having a positive Poisson's ratio.
4 more elements
A method of making an artificial heart valve, the method comprising:
- forming an inner leaflet body comprising a precursor material;
- applying a stimulus to the precursor material, the stimulus causing the precursor material to have a negative Poisson's ratio;
- forming an outer leaflet body at least partially surrounding the inner leaflet body, to form a leaflet comprising the inner leaflet body and the outer leaflet body, the outer leaflet body having a positive Poisson's ratio, wherein the inner leaflet body comprises a carbon structure having the negative Poisson ratio;
- and
- arranging the leaflet with respect to one or more struts of the artificial heart valve, the struts attached to a frame, such that movement of the leaflet opens and closes a fluid flow path through the frame in response to heartbeats, the one or more struts restricting movement of the leaflet.
2 more elements
Dependencies are inferred from the claim text.