Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2007-04-09
2008-11-04
Martin, Edgardo San (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S272000, C181S275000, C181S267000, C181S257000, C181S251000
Reexamination Certificate
active
07445083
ABSTRACT:
An automotive muffler includes an external tube consisting of a first widened portion, a first tapering portion, and a first narrow portion, the first widened section having a sealing wall with a through hole at the front end thereof; an internal tube consisting of a second widened portion, a second tapering portion, and a second narrow portion, the internal tube being disposed within the external tube, a plurality of vent holes being formed in the wall of the second widened portion; an internal guide tube consisting of a third widened portion, a third tapering portion, and a third narrow portion, the internal guide tube being disposed within the internal tube, a plurality of vent holes being formed in the wall of the third widened section that is disposed within the internal pipe; and a plurality of partitions interposed between the first widened section and the second widened section as well as between the second widened section and the third widened section. In this way, a reduced pumping loss and an increase output horsepower of the engine may be achieved.
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Martin Edgardo San
Rosenberg , Klein & Lee
LandOfFree
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