Muffler

Details Muffler Muffler

2007-08-14

2007-08-14

Donovan, Lincoln (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S266000, C181S273000, C181S276000, C181S249000, C181S255000, C181S269000, C123S184530, C123S184540, C123S184550, C123S184560, C123S184570

Reexamination Certificate

active

10890063

ABSTRACT:
A muffler which reduces noises of a wide frequency band with a simple structure. Sound waves of an intake duct enter into and are received in a resonance box via a branch pipe. At the branch pipe, a movable body slidingly abuts a peripheral portion of an opening of a cut-out portion. Due to the movable body rotating, a range of opening/closing of the cut-out portion is changed, and a length of a neck portion formed by the branch pipe and an arc-shaped plate, and a lateral cross-sectional surface area of a distal end of the neck portion, are changed.

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