Exhaust pipe silencer with side branch chambers and baffled elbow sections

Claim 1

IN AN EXHAUST CONDUIT FOR CONDUCTING EXHAUST GASES FROM AN AUTOMOTIVE ENGINE, A HOLLOW TUBE PROVIDING A PASSAGE FOR EXHAUST GAS, SAID TUBE HAVING A BENT SECTION PROVIDING A GAS PASSAGE SECTION THAT IS NOT STRAIGHT, SAID BENT SECTION HAVING A CONCAVE SIDE AND A CONVEX SIDE, THE CONCAVE SIDE OF SAID TUBE BENT SECTION HAVING A TRIAD OF INWARDLY EXTENDING PROJECTIONS ONE OF WHICH EXTENDS CROSSWISE OF THE TUBE AND A PAIR OF WHICH EXTEND LENGTHWISE OF THE TUBE AND ARE LOCATED RESPECTIVELY AT OPPOSITE ENDS OF SAID CROSSWISE PROJECTION, SAID PROJECTIONS BEING ADAPTED TO RESTRICT THE FLOW OF EXHAUST GASES THROUGH THE TUBE AND INCREASE THE TURBULENCE OF THE GASES TO REMOVE SOUND ENERGY FROM THE GASES AND IMPROVE THE SOUND ATTENTION OF THE TUBE.