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US 10,589,060 B2Granted
Extrusion with preferential bend axis
AssigneeBiosense Webster (Israel) Ltd.
InventorsChristopher Thomas Beeckler, Joseph Thomas Keyes
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Abstract
A catheter is made by coextruding first and second molten polymers, wherein the second molten polymer forms a flexible inner core and the first molten polymer forms exactly two bands on opposite sides of the inner core. The inner core is braided, and a third molten polymer extruded onto the braid to form a flexible jacket that encloses the braid, the bands and the inner core. The bands are more rigid than the inner core, and they provide preferential in-plane bending.
Claims7
A method, comprising the steps of:
- coextruding a first molten polymer with a second molten polymer, wherein the second molten polymer forms a flexible inner core and the first molten polymer forms exactly two bands partially inside of and on opposite sides of the inner core, the bands being more rigid than the inner core;
- overlaying a braid on the inner core and the bands;
- coextruding a third molten polymer onto the braid to form a jacket that encloses the braid, the bands and the inner core;
- and
- while performing the step of coextruding the third molten polymer, changing a first composition of the third molten polymer to a second composition of the third molten polymer to define a proximal segment and a distal segment of a shaft and a transitional segment therebetween, the proximal segment being more rigid than the distal segment.
2 more elements
Dependencies are inferred from the claim text.