Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2007-01-30
2009-06-23
Donels, Jeffrey (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S210000, C181S211000, C181S212000, C181S214000, C060S725000, C415S119000, C431S114000
Reexamination Certificate
active
07549506
ABSTRACT:
A resonator for damping pressure waves or instabilities in a system supported by acoustic energy wherein the resonator adopts the use of counter-bored openings on the downstream side of the resonator within the flow path of the system. The resonator includes a first member and a second member where the second member includes a plurality of openings therethrough with each hole having a counter-bore on its upstream side. The first member has a size substantially smaller than the diameter of said flow path and a first plurality of openings therethrough. The openings are in fluid communication with the flow path. The second member has a size generally equal to the first member and a second plurality of openings therethrough, which openings are in fluid communication with the flow path.
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Donels Jeffrey
Luks Jeremy
Siemens Energy Inc.
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