Cage and Sleeve Assembly for a Filtering Device
First Claim
1. A cage and sleeve assembly for an embolic filtering device used to filter embolic particles from a body vessel, comprising:
- a strut assembly that is movable between an unexpanded position and an expanded position;
a plurality of struts forming a cage, the struts having strut ends at the respective ends; and
a sleeve assembly;
wherein the strut ends comprise nitinol, and wherein the sleeve assembly comprises the strut ends and a series of welds securing the strut ends in the sleeve assembly.
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Accused Products
Abstract
A cage and sleeve assembly for an embolic filtering device used to filter embolic particles from a body vessel has a strut assembly that is movable between an unexpanded position and an expanded position. Struts having strut ends at the respective ends form a cage. The strut ends are initially made from linear elastic nitinol, and a series of spot or laser or other types of welds then secure the strut ends in the sleeve assembly. In one approach, the ends of the strut ends are welded to form a tube. In another approach, the strut ends are welded onto a sleeve. The strut ends may optionally have ends that are partial cylinders, and the partial cylinders are welded onto a cylindrical sleeve. Effects from the welding, such as changing linear elastic nitinol to superelastic nitinol, are contained within a heat-effected zone, and do not extend into areas of the structure that typically bend during use.
139 Citations
27 Claims
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1. A cage and sleeve assembly for an embolic filtering device used to filter embolic particles from a body vessel, comprising:
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a strut assembly that is movable between an unexpanded position and an expanded position; a plurality of struts forming a cage, the struts having strut ends at the respective ends; and a sleeve assembly; wherein the strut ends comprise nitinol, and wherein the sleeve assembly comprises the strut ends and a series of welds securing the strut ends in the sleeve assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A cage and sleeve assembly for an embolic filtering device used to filter embolic particles from a body vessel, comprising:
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a nitinol strut assembly that is movable between an unexpanded position and an expanded position; a plurality of nitinol struts forming a cage, the struts having nitinol strut ends at the respective ends; and a sleeve assembly; wherein the sleeve assembly comprises the strut ends and a series of welds securing the strut ends to the sleeve assembly; and wherein the cage assembly includes heat affected zones and linear elastic zones, the heat affected zones being confined to the strut ends and not extending into bending areas of the cage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification