Patent ID: 8746147

Claim:
A tubular wire mesh filter having a radially inner edge and a radially outer edge opposite and radially spaced apart from the inner edge, wherein wire forming the filter is uniform in cross-sectional area, and wherein a portion of the filter proximate the radially outer edge has an average density greater than an average density of a portion of the filter proximate the radially inner edge, wherein the filter has a first longitudinal portion with a radially outer edge having a first diameter and a second longitudinal portion adjacent the first portion, the second longitudinal portion having a radially outer edge having a second diameter different from the first diameter, wherein a portion of the filter proximate the first portion radially outer edge has an average density greater than an average density of a portion of the filter proximate the radially inner edge, and wherein a portion of the filter proximate the second portion radially outer edge has an average density greater than an average density of a portion of the filter proximate the radially inner edge.