Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2007-08-07
2007-08-07
Sherry, Michael (Department: 2836)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S250000, C181S273000, C181S276000, C417S057000, C417S322000, C417S410100
Reexamination Certificate
active
10922383
ABSTRACT:
An acoustic fluid machine such as an air compressor comprises an acoustic resonator, a valve device and a piston. Air is sucked into the resonator through the valve device at one end of the resonator. The piston at the other end of the resonator is reciprocated by an actuator to compress the air in the resonator to cause resonance to increase pressure of the air significantly. The inner surface of the resonator is suitably curved to comply with the formula of a half-period cosine function.
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Fujioka Tamotsu
Kawahashi Masaaki
Saito Masayuki
Anest Iwata Corporation
Davis & Bujold & Daniels, P.L.L.C.
Sherry Michael
Willoughby Terrence R.
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