US 4,612,767 AGranted

Exhaust manifold shield

AssigneeCaterpillar Inc.

InventorsKarl R. Engquist, Keith K. Klintworth

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Abstract

Heat shield assemblies are normally connected to engines which have exhaust systems in order to reduce the temperature of the outer surface. The skin temperature of the outer surface of the heat shield assembly must be cooled so that persons coming in contact with such a surface is not burned. The subject heat shield assembly includes a heat source, an inner member and an outer member which respectively define first and second cooling flow paths. The first cooling flow path being adapted to convect heat away from the heat source and the inner member as air passes therethrough and the second cooling flow path being adapted to convect heat away from the inner member and the outer member as air passes therethrough. The air passing through the first and second cooling flow paths effectively reduces the temperature of the outer member so that no one would be burned upon contact therewith.

Claims15

Dependent claims

A heat shield assembly adapted for use with an exhaust system of an engine, comprising:

a heat source connected to the engine;
an inner member partially surrounding the heat source and being supported in a predetermined spaced relation thereto;
said inner member being solid and having a bottom portion spaced away from the heat source to form a lower inlet opening, a top portion spaced away from the heat source a distance greater than that of the bottom portion to form an upper outlet opening, and an intermediate portion located between the top portion and the bottom portion and spaced from the heat source a distance intermediate of the distances at the bottom portion and the top portion;
a first cooling flow path defined between the heat source and the inner member and being adapted to convect heat away from said heat source and said inner member;
an outer member having an upper portion and a lower portion and being supported in at least partially covering predetermined spaced relation to the inner member;
and
a second cooling flow path defined between the inner member and the outer member and being adapted to convect heat away from said inner and outer members.

4 more elements

Dependencies are inferred from the claim text.