Muffler/exhaust extractor and method

A method for conditioning exhaust of an internal combustion engine, comprising:

• delivering exhaust gases from an internal combustion engine into a muffler housing containing a hollow interior;
• compressing, guiding and accelerating the exhaust gases within the housing by passing the exhaust gases through a generally outwardly extending compression chamber having flow-directing fins;
• dampening pressure variations within the exhaust gases by delivering the compressed exhaust gases adjacent a low pressure chamber;
• compressing and accelerating the exhaust gases within the housing by diverting the exhaust gases in a generally inwardly extending direction within a compression chamber;
• and
• removing the exhaust gases from the housing.

An exhaust conditioning device, comprising:

• a housing having an entrance duct, an exit duct, and a hollow interior defined within the housing between the entrance duct and the exit duct;
• a conical baffle carried within the housing downstream of the entrance duct and configured to form a generally outwardly extending compression chamber therebetween, the conical baffle cooperating with the housing to form a first vacuum chamber;
• a frustoconical baffle carried within the housing downstream of the conical baffle and upstream of the exit duct and configured to form a generally inwardly extending compression chamber, the frustoconical baffle cooperating with the housing to form a second vacuum chamber;
• and
• a perforated end plate affixed to a downstream end of one of the conical baffle and the frustoconical baffle so as to at least in part define the respective first vacuum chamber or second vacuum chamber.