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Water jacketed exhaust pipe for marine exhaust systems

DC
  • US 5,740,670 A
  • Filed: 12/29/1995
  • Issued: 04/21/1998
  • Est. Priority Date: 04/10/1995
  • Status: Expired due to Term
First Claim
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1. A water jacketed exhaust pipe for marine engines comprising:

  • an elongated inner liner, said liner having a tail end, said tail end defining a first inwardly tapered section;

    an elongated outer shell, said shell surrounding said liner about an elongate axis of said pipe, said shell further having a tail end, said shell tail end defining a second inwardly tapered section;

    said elongated inner liner extends axially beyond said tail end of said elongated outer shell;

    a spacer disposed between said outer shell and said inner liner for separating said shell from said liner at to define a volume therebetween, said spacer further defining at least one passageway there through communicating said volume with a second volume outside said exhaust pipe.

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