×

High temperature exhaust systems for marine propulsion devices

  • US 10,329,978 B1
  • Filed: 02/13/2018
  • Issued: 06/25/2019
  • Est. Priority Date: 02/13/2018
  • Status: Active Grant
First Claim
Patent Images

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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×