A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
3/117
A61F 2/24 (2006.01)
Patent
CA 1248302
ABSTRACT A heart valve prosthesis comprising a valve body por- tion of annular form having side walls defining a central passage extending axially therethrough, and at least one valve leaflet disposed within the valve body and the passage, the leaflet being and adapted for movement between open, closed, and a range of intermediate positions thereof, the valve prosthesis being characterized in that the body in- cludes at least a pair of spaced apart leaflet ear support formations each having a generally radially inwardly di- rected outer surface portion, and, lying within the leaflet ear support formation, at least one contoured recess having an inner end face, a pair of spaced apart, tapered, arcuate guide wall surfaces extending between the inwardly directed outer surface portion of the formation and the inner end face thereof, and a pair of spaced apart, curved ear support sur- faces joined at their ends to the ends of the guide wall sur- faces, the leaflet including a leaflet body portion having top and bottom surface portions and an outer side wall por- tion extending between and joining portions of the top and bottom surfaces, the outer side wall portion being adapted to cooperate in use with inwardly directed portions of the annular body so as to form a fluid-tight seal therewith in at least one portion of the leaflet, and mounting ears on the leaflet adapted to be received for free but limited move- ment within the recesses, the ears having upper and lower support surfaces of generally trapezoidal outline, a gener- ally flat and face portion, and two spaced apart guide sur- face portions, the guide surface portion being tapered so as to lie in closely spaced apart relation to the tapered guide walls in the recess.
503804
Bokros Jack
Osler Hoskin & Harcourt Llp
LandOfFree
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