Patent ID: 8062602
Filing Date: 2011-11-22
Classification: F01N

Abstract:
1. A catalyst housing conveying exhaust gas from upstream to downstream, the catalyst housing comprising: an exhaust gas inlet receiving a flow of exhaust gases; an exhaust gas outlet discharging the flow of exhaust gases; a housing body disposed between the inlet and outlet and removably containing a first catalyst located downstream of the exhaust gas inlet and upstream of the exhaust gas outlet; an access door providing access to the first catalyst in the housing body, the access door being attached to the housing body and movable between a closed, sealed position and an open, unsealed position; a sleeve on the first catalyst and first and second pressure rings on the sleeve; and at least one retention bolt having a distal end abutting the first ring, wherein as the retention bolt is torqued with respect to the housing body, axial force is applied to the first ring and then to the sleeve and then to the second ring to seal the first catalyst in the housing.