Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1983-09-16
1984-09-25
Weston, Caleb
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
3 15, 156285, 264250, 264255, 264511, 264545, 264553, 264554, 264571, B32B 3104
Patent
active
044734239
ABSTRACT:
An artificial heart valve having thin, seamless leaflets which converge to the center of a frame from the frame's inner wall. The leaflets each have a convex outflow surface and a concave inflow surface. The leaflets meet along adjacent edges to form cusps. Sinus valsalvae sections of the valve are formed as rounded recesses defined in the valve frame's inner wall as continuous curved profiles of the respective leaflet concave surfaces. The valve is fabricated by vacuum molding techniques whereby layers of elastomer are vacuum formed to comprise the leaflet and sinus valsalvae portions. In one embodiment, the leaflets are all formed from two or more layers of elastomer which are cut to define the leaflet edges or commissures. One elastomer layer extends along the frame recess to provide continuity for each leaflet and its sinus valsalvae. The resulting structure has no rims or seams in the inflow or outflow paths.
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University of Utah
Weston Caleb
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