Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2007-11-13
2007-11-13
Donovan, Lincoln (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S247000, C181S249000, C181S250000, C181S255000, C181S266000, C181S269000, C181S272000, C181S273000, C181S276000, C181S282000
Reexamination Certificate
active
11130148
ABSTRACT:
A cylindrical shell main body constituting a muffler main body is formed of two layers of an inner shell and an outer shell and has a cylindrical shape with a cross section that is not a perfect circle but is defined by alternated small arc portions and large arc portions similarly to an oval, or the like. The outer shell of the shell main body has, in each of their small arc portions, four radially projecting beads continuously extending in a circumferential direction along the small arc portions and being a predetermined distance apart from one another in an axial direction, thereby allowing an upper and lower gaps between the inner shell and the outer shell in the respective large arc portions of the shell main body to communicate with each other through passages formed by the beads.
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Calsonic Kansei Corporation
Donovan Lincoln
Foley & Lardner LLP
Luks Jeremy
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