Patent ID: 8734480

Claim:
A filter for a body lumen, comprising: an axial member having a first set of expandable legs and a second set of expandable legs, each leg of the first set of expandable legs comprising: a first portion, having an inner segment coupled to the axial member and an outer segment configured to be radially expandable from the axial member, wherein an external angle extending between an outside surface of the first portion and the axial member is an obtuse angle, and a second portion, having an outer segment coupled to the outer segment of the first portion and an inner segment coupled to the axial member, the outer segment of the second portion configured to be radially expandable from the axial member, wherein the first portion is coupled to the second portion at a first apex, wherein an internal angle extending between an inside surface of the first portion and an inside surface of the second portion is an acute angle, and wherein an external angle extending between an outside surface of the second portion and the axial member is an obtuse angle; and each leg of the second set of expandable legs comprising: a first portion, having an inner segment coupled to the axial member and an outer segment configured to be radially expandable from the axial member, wherein an external angle extending between an outside surface of the first portion and the axial member is an obtuse angle, and a second portion, having an outer segment coupled to the outer segment of the first portion and an inner segment coupled to the axial member, the outer segment of the second portion configured to be radially expandable from the axial member, wherein the first portion is coupled to the second portion at a second apex, wherein an internal angle extending between an inside surface of the first portion and an inside surface of the second portion is an acute angle, and wherein an external angle extending between an outside surface of the second portion and the axial member is an obtuse angle; and wherein the plurality of the first apexes of the first set of legs are spaced apart from the plurality of the second apexes of the second set of legs a distance parallel to a longitudinal axis of the axial member, when the first and second sets of legs are expanded.