High temperature exhaust systems for marine propulsion devices
First Claim
1. An exhaust system for a marine propulsion device comprising an internal combustion engine and a driveshaft housing, the exhaust system comprising:
- an exhaust manifold that conveys exhaust gas from the internal combustion engine, the exhaust manifold having a downstream end with an outer surface;
an exhaust conduit that conveys the exhaust gas between the exhaust manifold and the driveshaft housing, the exhaust conduit having an upstream end with an outer surface;
a flexible coupler having an outer surface and an inner surface, the flexible coupler coupling the downstream end of the exhaust manifold and the upstream end of the exhaust conduit such that a gap is retained between the downstream end of the exhaust manifold and the upstream end of the exhaust conduit;
a metallic coil coaxially aligned with the flexible coupler, wherein the flexible coupler biases the metallic coil into contact with both the outer surface of the exhaust manifold and the outer surface of the exhaust conduit;
a first clamp engaging the outer surface of the flexible coupler such that the inner surface of the flexible coupler sealingly engages with the outer surface of the exhaust manifold; and
a second clamp engaging the outer surface of the flexible coupler such that the inner surface of the flexible coupler sealingly engages with the outer surface of the exhaust conduit;
wherein the metallic coil is configured such that when in contact with both the outer surface of the exhaust manifold and the outer surface of the exhaust conduit, the metallic coil shields the flexible coupler from the exhaust gas and also conducts heat between the exhaust manifold and the exhaust conduit.
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Accused Products
Abstract
An exhaust system for a marine propulsion device having an engine and a driveshaft housing. An exhaust manifold having a downstream end with an outer surface conveys exhaust gas from the engine. An exhaust conduit having an upstream end with an outer surface conveys the exhaust gas to the driveshaft housing. A flexible coupler couples the downstream end of the exhaust manifold and the upstream end of the exhaust conduit, retaining a gap between them. A metallic coil is aligned with the flexible coupler, which biases the metallic coil into contact with the outer surfaces of the exhaust manifold and the exhaust conduit to conduct heat between them. First and second clamps engage outer surfaces of the flexible coupler to cause inner surfaces of the flexible coupler to sealingly engage the outer surface of the exhaust manifold, and the outer surface of the exhaust conduit, respectively.
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Citations
15 Claims
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1. An exhaust system for a marine propulsion device comprising an internal combustion engine and a driveshaft housing, the exhaust system comprising:
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an exhaust manifold that conveys exhaust gas from the internal combustion engine, the exhaust manifold having a downstream end with an outer surface; an exhaust conduit that conveys the exhaust gas between the exhaust manifold and the driveshaft housing, the exhaust conduit having an upstream end with an outer surface; a flexible coupler having an outer surface and an inner surface, the flexible coupler coupling the downstream end of the exhaust manifold and the upstream end of the exhaust conduit such that a gap is retained between the downstream end of the exhaust manifold and the upstream end of the exhaust conduit; a metallic coil coaxially aligned with the flexible coupler, wherein the flexible coupler biases the metallic coil into contact with both the outer surface of the exhaust manifold and the outer surface of the exhaust conduit; a first clamp engaging the outer surface of the flexible coupler such that the inner surface of the flexible coupler sealingly engages with the outer surface of the exhaust manifold; and a second clamp engaging the outer surface of the flexible coupler such that the inner surface of the flexible coupler sealingly engages with the outer surface of the exhaust conduit; wherein the metallic coil is configured such that when in contact with both the outer surface of the exhaust manifold and the outer surface of the exhaust conduit, the metallic coil shields the flexible coupler from the exhaust gas and also conducts heat between the exhaust manifold and the exhaust conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An exhaust system for a marine propulsion device comprising an internal combustion engine and a driveshaft housing, the exhaust system comprising:
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an exhaust manifold that conveys exhaust gas from the internal combustion engine, the exhaust manifold having a downstream end with an outer surface; a first exhaust conduit that conveys the exhaust gas from the exhaust manifold, the first exhaust conduit having an upstream end and a downstream end each having an outer surface; a first flexible coupler having an outer surface and an inner surface, the first flexible coupler coupling the downstream end of the exhaust manifold and the upstream end of the first exhaust conduit such that a gap is retained between the downstream end of the exhaust manifold and the upstream end of the first exhaust conduit; a first metallic coil coaxially aligned with the first flexible coupler, wherein the first flexible coupler biases the first metallic coil into contact with both the outer surface of the exhaust manifold and the outer surface of the first exhaust conduit; a first clamp engaging the outer surface of the first flexible coupler such that the inner surface of the first flexible coupler sealingly engages with the outer surface of the exhaust manifold; a second clamp engaging the outer surface of the first flexible coupler such that the inner surface of the first flexible coupler sealingly engages with the outer surface of the first exhaust conduit; a second exhaust conduit that conveys the exhaust gas between the first exhaust conduit and the driveshaft housing, the second exhaust conduit having an upstream end with an outer surface; a second flexible coupler having an outer surface and an inner surface, the second flexible coupler coupling the downstream end of the first exhaust conduit and the upstream end of the second exhaust conduit such that a gap is retained between the downstream end of the first exhaust conduit and the upstream end of the second exhaust conduit; a second metallic coil coaxially aligned with the second flexible coupler, wherein the second flexible coupler biases the second metallic coil into contact with both the outer surface of the first exhaust conduit and the outer surface of the second exhaust conduit; a third clamp engaging the outer surface of the second flexible coupler such that the inner surface of the second flexible coupler sealingly engages with the outer surface of the first exhaust conduit; and a fourth clamp engaging the outer surface of the second flexible coupler such that the inner surface of the second flexible coupler sealingly engages with the outer surface of the second exhaust conduit; wherein the first metallic coil is configured such that when in contact with both the outer surface of the exhaust manifold and the outer surface of the first exhaust conduct, the first metallic coil shields the first flexible coupler from the exhaust gas and also conducts heat between the exhaust manifold and the first exhaust conduit; and wherein the second metallic coil is configured such that when in contact with both the outer surface of the first exhaust conduit and the outer surface of the second exhaust conduct, the second metallic coil shields the second flexible coupler from the exhaust gas and also conducts heat between the first exhaust conduit and the second exhaust conduit. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification