Muffler
AssigneeNihon Rajieeta Kabushiki Kaisha (Nihon Radiator Co., Ltd.)
InventorEizo Suyama
Life of this patent
Estimating the term…
Abstract
A muffler of the expansion type comprises an inlet pipe and an outlet pipe connected with each other through a main body. Minimization of pressure pulsation is achieved by a variety of means including appropriately-located apertures in those portions of the walls of said pipes within said main body, an apertured partition within said main body so located that exhaust gas passes through said partition, and appropriate tapering of said pipes. A foamed, heat-resistant material may be positioned over said apertures in said walls of said pipes. Pipe constructions suitable for mass production and pipe-to-main body constructions free of the danger of separation during prolonged use are shown.
Claims14
A muffler for attenuating sound pulsations in exhaust gas, comprising a sealed main body, including a curved housing of circular or elliptical cross-section and forward and rear end plates joined to said housing, said housing and end plates forming a principal chamber, each of said end plates having an aperture therein spaced apart from said curved housing, inlet pipe means traversing said aperture in said forward end plate sealingly for introduction of gas into said chamber, that part of said inlet pipe means within said chamber having a forward and a rearward portion and a downstream end on said rearward portion, and outlet pipe means traversing said aperture in said rear end plate for exhausting gas from said chamber, that part of said outlet pipe means within said chamber having a forward and a rearward portion and an upstream end on said forward portion extending to said forward plate, said inlet pipe means becoming narrower toward the downstream end thereof forming a narrower cylindrical wall which extends to said rear end plate, and said outlet pipe means having at least one opening in the cylindrical wall thereof, said outlet pipe means passing through the wall of the principal chamber at which said inlet pipe terminates.
A muffler for attenuating sound pulsations in exhaust gas, comprising a sealed main body, including a curved housing of circular or elliptical cross-section and forward and rear end plates joined to said housing, said housing and end plates forming a chamber, each of said end plates having an aperture therein spaced apart from said housing, inlet pipe means traversing said aperture in said forward end plate sealingly for introduction of gas into said chamber, that part of said inlet pipe means within said chamber having a forward and a rearward portion and a downstream end on said rearward portion, and outlet pipe means tranversing said aperture in said rear end plate for exhausting gas from said chamber, that part of said outlet pipe means within said chamber having a forward and a rearward portion and an upstream end on said forward portion extending to said forward end plate, said inlet pipe means becoming narrower toward the downstream end thereof, and said downstream end having at least one opening for exiting exhaust gas.
Dependencies are inferred from the claim text.