Patent ID: 6892853

Claim:
A muffler for use in attenuating a sound induced by or associated with discharging gas produced by a machine, comprising: an body having a first axis along its length and including a first partition for defining an inlet chamber, the body having an inlet opening on a side and an outlet opening at one end; an inlet pipe connected at one end to the inlet opening for delivering the gas into the inlet chamber at an angle to the first axis greater than zero degrees; a first pipe extending from the inlet chamber through the first partition into a second chamber, the first pipe including one or more perforations at a first portion of the first pipe in the inlet chamber, wherein the one or more perforations permit gas in the inlet chamber to flow into the first pipe and into the second chamber; a second partition defining the second chamber as an intermediate chamber and separating the intermediate chamber from an outlet chamber that includes the outlet opening, wherein a length of the intermediate chamber is about one half a length of the inlet chamber; and an outlet pipe connected to the outlet opening for discharging muffled gas from the body.