Exhaust system for a small planing craft

  • US 5,550,337 A
  • Filed: 07/22/1992
  • Issued: 08/27/1996
  • Est. Priority Date: 10/06/1989
  • Status: Expired due to Fees
First Claim
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1. An exhaust silencer for a watercraft having a hull, an internal combustion engine positioned within said hull substantially along a longitudinal center plane thereof, said internal combustion engine having at least one exhaust port for discharge of exhaust gases from said engine, said silencer comprising a first expansion chamber housing on one side of said hull, said first expansion chamber housing defining at least one internal expansion volume, an inlet for receiving exhaust gases and delivering exhaust gases to said first expansion chamber expansion volume, and an outlet for discharge of exhaust gases from said first expansion chamber housing expansion volume, conduit means for delivering exhaust gases from said engine exhaust port to said first expansion chamber housing inlet, a discharge conduit having a first end connected to said outlet of said first expansion chamber housing and a second end, a second expansion chamber housing positioned on the other side of said hull from said one side, said second expansion chamber housing defining at least one internal expansion volume, an input connected to said second end of said discharge conduit for delivering exhaust gases from said discharge conduit to said expansion volume of said second expansion chamber housing, and an output for discharging exhaust gases from said second expansion chamber housing expansion volume to the atmosphere, at least one of said expansion chamber housings being supported within said hull independently of said engine.

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