Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2006-11-21
2006-11-21
Omgba, Essama (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S464000, C029S469000, C029S469500, C029S557000, C623S002420, C140S07100R
Reexamination Certificate
active
07137184
ABSTRACT:
Methods for forming a support frame for flexible leaflet heart valves from a starting blank include converting a two-dimensional starting blank into the three-dimensional support frame. The material may be superelastic, such as NITINOL, and the method may include bending the 2-D blank into the 3-D form and shape setting it. A merely elastic material such as ELGILOY may be used and plastically deformed in stages, possibly accompanied by annealing, to obtain the 3-D shape. Alternatively, a tubular blank could be formed to define a non-tubular shape, typically conical. A method for calculating the precise 2-D blank shape is also disclosed. A mandrel assembly includes a mandrel and ring elements for pressing the blank against the external surface of the mandrel prior to shape setting.
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Cumberbatch Guy
Edwards Lifesciences Corporation
Omgba Essama
Yadav Rajiv
LandOfFree
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