Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1998-05-07
1999-09-28
Dang, Khanh
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181236, 181237, 181265, 181272, F01N 100
Patent
active
059592630
ABSTRACT:
This invention relates to an exhaust gas muffler assembly for internal combustion engines which is operable in both a muffled or unmuffled mode. In exterior appearance, the bypass muffler of this invention looks like a conventional muffler having a shell and end caps which enclose the interior components, an inlet for entry of the exhaust gas from the engine, and two outlets for exit of the exhaust gas to atmosphere. A first outlet is preferably positioned opposite to the exhaust gas inlet and connected directly to the inlet by means of a pipe. This pipe is not provided with silencing means. Within the interior of the muffler are silencing means employing a center pipe and an exhaust gas outlet pipe, each of which are provided with silencing means such as apertures in the walls of each pipe. Flow diverting means are removably placed within the first outlet. When the flow diverting means are in place, exhaust gas is diverted through an opening in the side wall of the pipe leading from the exhaust gas inlet to and through the center pipe and finally through the exhaust gas outlet pipe and out the second outlet in a muffled state.
REFERENCES:
patent: 1626908 (1927-05-01), Amstrong
patent: 4779705 (1988-10-01), Verdin
patent: 5723827 (1998-03-01), Sasaki et al.
Biggs Manufacturing, Inc.
Cates Charles E.
Dang Khanh
Harrer Richard G.
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