Patent ID: 11913365
Assignee: WATLOW ELECTRIC MANUFACTURING COMPANY
Field: Environmental technology (Chemistry)
Classification: CPC F  H  Y | IPC F  H

Claim 12:
13. An exhaust gas heater system for an exhaust system of an internal combustion engine, the exhaust gas heater system comprising:
a tubular housing comprising an outer peripheral wall defining a tubular shape disposed about a central axis and defining an interior hollow space configured to receive exhaust gas from an exhaust pipe of the exhaust system such that the exhaust gas flows through the interior hollow space; and
a heating element positioned within the hollow space and including a first end and a second end, the heating element including an electrically conductive resistance element between the first and second ends, the electrically conductive resistance element forming a plurality of sections arranged successively closer to the central axis, wherein the heating element follows a path that proceeds from the first end to the second end such that the path proceeds in a first direction along a first set of the sections and a second direction along a second set of the sections;
wherein the first and second ends extend through radially outward of the outer peripheral wall on a same side, relative to the central axis, of the outer peripheral wall to receive power from outside the hollow space.