Gm Global Technolgoy Operations, Inc.

Albert Hunter Mayfield

Barry Odell Christenson

Charles Scott Nelson

Stephen Joe Myers

John Eric Kreucher

Theodore Rogers Turner, Jr

A catalyst heater assembly for use in a catalytic converter comprising: an electric heater through which a flow of gas passes, wherein the electric heater heats the gas; a plurality of legs around an exterior of the heater, each leg extending in an axial direction toward a flow inlet of the catalytic converter; a flow tube having an inlet end and an outlet end, wherein each of the legs is attached to an exterior peripheral surface of the outlet end and wherein the inlet end is mounted at the flow inlet of the catalytic converter.

Catalyst heater assembly

A low restriction exhaust treatment apparatus having a hollow outer shell into which a means for treating exhaust gas emitted from an internal combustion engine is disposed, end portions disposed at each end of the outer shell to sealingly close the inner portion of the shell, and end tubes inserted into apertures formed in the sealing end portions for facilitating exhaust flow into and out of the apparatus. The end tubes each have a plurality of axially extending, radially inwardly angled serrations formed about one end thereof to form a lead-in portion of a reduced diameter for ease of insertion of the tubes into the apertures of the end portions without creation of undesirable exhaust system back pressure.

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Swartz Creek, MI, United States of America

Albert Hunter Mayfield