Patent ID: 8449831

Claim:
A catalytic device comprising: a shell having an inlet and an outlet, the inlet is in fluid communication with the outlet through an opening extending through the shell; a catalyst substrate disposed within the opening and between the inlet and outlet, the catalyst substrate including a flow through structure in fluid communication with the inlet and outlet, the catalyst substrate having an outer surface surrounding the flow through structure and that faces an inner surface of the shell, wherein a first end of the outer surface is bent over toward the flow through structure, so as to mechanically lock and seal the catalyst substrate in place; a mat disposed between the outer surface of the catalyst substrate and the inner surface of the shell such that the mat is directly pressed against and sealed between the outer surface of the catalyst substrate and the inner surface of the shell; and the outer surface having at least one retention barb in direct contact with the mat, the shell is a spin formed member where the catalyst substrate and mat are disposed within the opening of the shell and between the inlet and outlet when the shell is spin formed.