Patent ID: 6543577
Filing Date: 2003-04-08
Classification: F01N

Abstract:
A silencer, comprising:a polymeric casing defining a chamber and having a first portion defining an inlet and a second portion defining an outlet; an exhaust gas inlet pipe extending through the inlet into the polymeric casing for conveying exhaust gas into the polymeric casing, the inlet and the exhaust gas inlet pipe cooperating to define a first gap therebetween; an exhaust gas outlet pipe extending out of the polymeric casing through the outlet for conveying exhaust gas from the polymeric casing, the outlet and the exhaust gas outlet pipe cooperating to define a second gap therebetween; a polytetrafluoroethylene bushing pressed into each of the first and second gaps so as to be secured in an interference fit between the inlet and outlet of polymeric casing and the exhaust gas inlet and outlet pipes, respectively, so as to provide resistance to heat transfer therebetween and to provide exhaust gas seals for the chamber.