Flanged heating element with thermal expansion joint
View Patent ↗An air heater for heating air entering a combustion chamber of an internal combustion engine is disclosed. The air heater includes a heating element having a substantially planar portion and a flange portion. The flange portion is positioned at an angle to the planar portion. The planar portion is positioned within an air flow at an upstream location relative to the flange portion. A structure is operable to position the heating element in communication with the air entering the combustion chamber of the engine. In addition, a thermal expansion joint for interconnecting a heating element and a frame is disclosed.
1. An air heater for heating air entering a combustion chamber of an internal combustion engine, the air heater comprising:
a frame having an aperture extending therethrough;
a heating element having first and second ends, said heating element being positioned in communication within said aperture; and
a retainer coupling said first end of said heating element to said frame, said retainer being operable to move relative to said frame to allow said heating element to thermally expand and contract during operation of said heater, wherein said retainer includes a fastener captured within a slot formed in said frame, said fastener being restricted from movement in a first direction and allowed to move in a second direction substantially perpendicular to said first direction.
2. The air heater of claim 1 wherein said slot is open at one end.
3. The air heater of claim 1 wherein said frame includes a stanchion having first and second opposite faces, said fastener having a first and second spaced apart flanges, said first flange being positioned on the same side of said stanchion as said first face, said second flange being positioned on the same side of said stanchion as said second face, wherein said first and second flanges are operable to limit the movement of said fastener relative to said stanchion in said first direction.
4. The air heater of claim 3 wherein said heating element is clamped between said first flange and a nut threadingly engaging said fastener.
5. The air heater of claim 4 further including another heating element positioned in communication with said aperture, said another heating element being clamped between said second flange and another nut threadingly engaging said fastener.
6. The air heater of claim 5 wherein said fastener includes a first part separable from a second part, said first part including said first flange, said second part including said second flange.
7. The air heater of claim 6 wherein said first part is threadably coupled to said second part.