Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1986-06-27
1988-01-19
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181265, 181272, F01N 108
Patent
active
047199881
ABSTRACT:
The muffler comprises a main sound arresting chamber formed in the interior of an outer cylinder of the muffler and a bracket fixedly secured to the outer surface of the outer cylinder for mounting the muffler on a body of a motorcycle. The muffler is provided with an auxiliary sound arresting chamber formed in the interior of the bracket and communicating with the main sound arresting chamber through a connecting passage so as to increase the total volume of the sound arresting chamber, thereby permitting the output of the engine of the motorcycle to be enhanced while the sound arresting effect on the exhaust gas is improved. The main sound arresting chamber may be divided into an upstream side main sound arresting chamber portion and downstream side main sound arresting chamber portions by partition means and the auxiliary sound arresting chamber portion communicates with the upstream main sound arresting chamber portion. The connecting passage may be in the form of a plurality of small diameter holes. The outer cylinder may be provided with plating liquid drain holes communicating with an end of the auxiliary sound arresting chamber so as to expedite drain of the plating liquid during the plating process, the plating liquid drain holes being blocked by a baffle member incorporated in the interior of the outer cylinder.
REFERENCES:
patent: 4038820 (1977-08-01), Tsukamoto
patent: 4149611 (1979-04-01), Taguchi
patent: 4416350 (1983-11-01), Hayashi
Kanazawa Wataru
Kinouchi Sosuke
Shigemoto Syuziro
Fuller Benjamin R.
Kawasaki Jukogyo Kabushiki Kaisha
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