Muffler

Claim 1

A COMBINED TAILPIPE AND EXHAUST SILENCER COMPRISING A LONG OUTER TUBE OF SUBSTANTIALLY UNIFORM DIAMETER FROM END TO END AND ADAPTED TO EXTEND FROM THE FRONT TO THE REAR OF A VEHICLE, FIRST AND SECOND ANNULAR SILENCING DEVICES SECURED INSIDE OF THE TUBE, EACH AT ONE END ONLY, SAID FIRST SILENCING DEVICE COMPRISING A RESONATOR CHAMBER FORMING MEANS INCLUDING AN ENLARGED END SECURED TO THE OUTER TUBE AND A REDUCED END FORMING A TUNING PASSAGE WITH THE OUTER TUBE, THE INSIDE OF THE MEANS BETWEEN SAID TWO ENDS COMPRISING A FLOW PASSAGE FOR GAS AND THE OUTSIDE FORMING WITH SAID TUBE A RESONATOR CHAMBER, THE OTHER OF SAID MEANS COMPRISING A TUBULAR DEVICE HAVING AN ENLARGED END SECURED TO THE OUTER WALL AND ADDITIONAL ENLARGEMENTS SLIDABLY FITTING THE OUTER WALL, THE INNER PORTION OF SAID OTHER MEANS BEING PERFORATED AND FORMING WITH THE ENLARGEMENTS AND OUTER TUBE A PLURALITY OF CHAMBERS FOR SILENCING HIGH FREQUENCIES.