US 6,585,078 B2 · Muffler insert

Abstract

An insert assembly for a muffler of a high-performance motor cycle, having an insert with a filling of compressed heat-resistant, sound-absorbing material mounted on a removable hollow tube having an inside diameter greater than the outside diameter of the perforated core of the muffler. The filling includes a bulked-up continuous filamentary material. Once the insert has been introduced into the muffler by sliding the tube along the core, the tube is then withdrawn leaving the insert behind in the muffler. Removal of the tube allows the filling to relax towards its intended density. The first subsequent exposure to hot exhaust gases causes certain portions of the insert to degrade, allowing further relaxation of the filling to assume its intended density. Further, the tube precludes potential damage to the insert during its introduction into the muffler.

Claims24

Dependent claims

An insert assembly for a motor vehicle exhaust muffler of the type including a perforated core and a housing generally co-axial, comprising:

(a) a hollow tube with inner dimensions exceeding the outside dimensions of a perforated core;
(b) a retaining layer wrapped around the tube and slidably retained thereon;
(c) a wrap layer overlaying the retaining layer and stitched thereto around the border thereof;
and
(d) a fibrous filling compressed between the wrap layer and the retaining layer to a density greater than that contemplated when the filling is in use;
so that the tube can be translated along the core until it passes into a muffler casing.

3 more elements

Dependencies are inferred from the claim text.

Muffler insert

Life of this patent

Muffler insert

Life of this patent

Abstract

Claims24