US 11,911,274 B2
Artificial heart valves incorporating negative poisson's ratio materials
Joon Bu Park, Huntington Beach, CA (US)
Filed by Joon Bu Park, Huntington Beach, CA (US)
Filed on Oct. 27, 2021, as Appl. No. 17/512,340.
Prior Publication US 2023/0126111 A1, Apr. 27, 2023
Int. Cl. A61F 2/24 (2006.01)
CPC A61F 2/2454 (2013.01) [A61F 2/2415 (2013.01)] 15 Claims
OG exemplary drawing
 
1. 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.
 
8. 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.