Sound dampening assembly for automotive exhaust system

Details Sound dampening assembly for automotive exhaust system Sound dampening assembly for automotive exhaust system

2007-07-24

2007-07-24

Sircus, Brian (Department: 2836)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S273000, C180S296000

Reexamination Certificate

active

10883168

ABSTRACT:
A sound dampening assembly adapted to engage an exhaust pipe in an automotive engine exhaust system adjacent an outlet of an internal combustion engine. The assembly includes a bottle portion having a single opening and an interior defining a predetermined amount of volume and a neck portion having a first end attached to the opening of the bottle portion and extending from the bottle portion. The neck portion is in fluid communication with the bottle portion interior and includes a second end adapted to be attached to the exhaust pipe. The neck portion has an interior defining a predetermined amount of volume and the bottle portion and the neck portion are sized to attenuate vibration at a predetermined frequency in the exhaust system.

REFERENCES:
patent: 3505028 (1970-04-01), Douthit
patent: 4408675 (1983-10-01), Keller
patent: 4779415 (1988-10-01), Richardson et al.
patent: 5283398 (1994-02-01), Kotera et al.

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