Multi-Fold side branch muffler
AssigneeJB Design, Inc.
InventorRonald G. Huff
Life of this patent
Estimating the term…
Abstract
A compact muffler has a straight through inner cylindrical casing surrounded by an outer cylindrical casing defining a closed ended sound attenuating chamber therebetween. Within the outer chamber a plurality of axially extending, radially overlying, cylindrical intermediate casings form a plurality of annular sound attenuating passages. The sound passages are configured to have entrances in fluid communication either with an especially configured slot in the inner casing or between certain passages to define a plurality of discrete sound paths, with each sound path having a set length sufficient to generate a reflection wave for attenuating a sound wave having a frequency correlated to the distance of the sound path.
Claims6
A muffler for attenuating the sounds of combustion gases exhausted from an internal combustion engine comprising:
- a tubular inner casing having an inlet in fluid communication with said gases exhausted from said engine and an outlet through which said gases are exhausted to atmosphere, said inner casing axially extending between said inlet and said outlet to define an open ended inner chamber through which said gases freely pass;
- an outer casing spaced radially outward from and at least partially circumscribing said inner casing and axially extending substantially the distance between said inlet and said outlet, said outer casing having radial end sections at said inlet and said outlet extending to said inner casing to define a closed ended outer chamber;
- slotted opening means providing substantially unimpeded fluid communication between said inner and outer chambers at a set axial position;
- and,
- sound attenuation means within said outer chamber for producing reflected waves attenuating at least one sound wave of a set frequency.
Dependencies are inferred from the claim text.