Patent ID: 7708953
Filing Date: 2010-05-04
Classification: F01N,Y10T

Abstract:
1. An apparatus for ensuring proper assembly of an exhaust system, the apparatus comprising: a first exhaust treatment unit communicable in exhaust flowing communication with a second exhaust treatment unit, each of the first and second exhaust treatment units comprising an interior surface and opposing exterior surface; wherein the first exhaust treatment unit comprises a mating perimeter configured to mate with a mating perimeter of the second exhaust treatment unit; wherein the mating perimeter of the first exhaust treatment unit comprises a recess formed in a rim extending from the mating perimeter of the first exhaust treatment unit, the recess being positioned about only a portion of the mating perimeter, the recess having a first size and shape, and being positioned at a first circumferential location of the mating perimeter of the first exhaust treatment unit; wherein the recess is configured to matingly engage a projection of the mating perimeter of the second exhaust treatment unit, the projection being positioned about only a portion of the mating perimeter of the second exhaust treatment unit, the projection having a second size and shape corresponding to the first size and shape, the projection being positioned at a second circumferential location of the mating perimeter of the second exhaust treatment unit, the second circumferential location corresponding to the first circumferential location of the mating perimeter of the first exhaust treatment unit, and the projection protruding inwardly from the interior surface of the first exhaust treatment unit; wherein when the first and second exhaust treatment units are matingly engaged, the recess and rim are positioned within the second exhaust treatment unit, the projection is positioned within the recess, and the recess and projection contact each other to prevent relative rotation between the first and second exhaust treatment units; wherein the apparatus further comprises a gasket configured to seal the mating perimeters of the first and second exhaust treatment units; and wherein the apparatus further comprises a fastener positioned about the mating perimeters and the gasket.