Patent ID: 8191356

Claim:
An injector module for injecting reductant into an exhaust tailpipe, the injector module comprising: a reductant injector; and an injector module flange cover including: a substantially flat surface arranged perpendicular to a length of the reductant injector, the flat surface including an injector hole centrally positioned therein, where the reductant injector is engaged with the flat surface and extends above the flat surface, a connecting surface continuous with a perimeter of the flat surface, the connecting surface curvedly extending below the flat surface, a lip portion continuous with the connecting surface and extending outward from the connecting surface, and a first ring-shaped protrusion concentrically arranged around the injector hole, the first ring-shaped protrusion extending from the flat surface in a direction that is downward below the flat surface, where the lip portion of the injector module flange cover extends further below the flat surface than the first ring-shaped protrusion, where the flat surface includes at least two fastening holes positioned symmetrically on opposite sides of the first ring-shaped protrusion, the at least two fastening holes aligned on a common axis with the injector hole, and where the flat surface further includes at least one off-centered hole positioned between the first ring-shaped protrusion and at least one of the at least two fastening holes, the at least one off-centered hole being offset from the common axis.