Patent ID: 8580003

Claim:
An exhaust gas purifying device comprising: a diesel oxidation catalyst and a soot filter for purifying an exhaust gas discharged from an engine; a catalyst inner case for holding the diesel oxidation catalyst; a filter inner case for holding the soot filter; a catalyst outer case for holding the catalyst inner case; and a filter outer case for holding the filter inner case; and wherein a first flange is provided at an outer peripheral end of the catalyst outer case at a downstream side of a moving direction of the exhaust gas, and a second flange is provided at an outer peripheral end of the filter outer case in an upstream side of the moving direction of the exhaust gas; wherein in a state where the catalyst outer case and the filter outer case are connected via the first and second flanges, an end of the filter inner case in the upstream side of the moving direction of the exhaust gas is apart from by a space and faces an end of the catalyst inner case in the downstream side of the moving direction of the exhaust gas; wherein in said state the first and second flanges are at axially offset positions with respect to said space between the end of the catalyst inner case in the downstream side of the moving direction of the exhaust gas and the end of the filter inner case in the upstream side of the moving direction of the exhaust gas; and wherein one inner case of the catalyst inner case and the filter inner case overlaps with one outer case among the catalyst outer case and the filter outer case, said one outer case holding the other inner case of said catalyst inner case and said filter inner case.