Patent ID: 7332137

Claim:
An end cone assembly for an exhaust emission control device, comprising: an outer cone comprising a small outer cone end and a large outer cone end with an outer wall extending therebetween, wherein the outer wall diverges from proximal the small outer cone end toward the large outer cone end; an inner cone comprising a small inner cone end and a large inner cone end with an inner wall having a first diameter proximal the small inner cone end, wherein the inner wall diverges to a second diameter, wherein the second diameter is disposed proximal a recessed portion having a third diameter at the large inner cone end, and wherein the first diameter is smaller than the third diameter and the third diameter is smaller than the second diameter; and an insulating member disposed within the recessed portion of the inner cone; wherein the outer wall is disposed in a spaced relation to at least a portion of the inner wall and wherein, with the exception of the recessed portion, the space between the inner and outer walls is free of insulating material.