Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2006-03-14
2006-03-14
Martin, Edgardo San (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S252000, C181S256000, C181S279000, C181S280000
Reexamination Certificate
active
07011180
ABSTRACT:
A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the noise source are positioned in the flow stream in direct acoustic line of sight relation). The method includes positioning an absorbent element in the flow stream between the noise source and the reference point. Then, the ultrasonic noise is directed past vicinity of the absorbent element such that indirect ultrasonic noise is absorbed by the absorbent element. Preferably, the method also includes deflecting the ultrasonic noise to convert direct noise to indirect noise prior to directing the ultrasonic noise past the vicinity of the absorbent material in the flow stream. Such a method may be employed to attenuate ultrasonic noise by up to about 20 dB to 45 dB.
REFERENCES:
patent: 4104915 (1978-08-01), Husse
patent: 4141334 (1979-02-01), Hatz et al.
patent: 4204586 (1980-05-01), Hani et al.
patent: 4236597 (1980-12-01), Kiss et al.
patent: 4317502 (1982-03-01), Harris et al.
patent: 4371054 (1983-02-01), Wirt
patent: 4468971 (1984-09-01), Herzl et al.
patent: 4485890 (1984-12-01), Harris et al.
patent: 4528652 (1985-07-01), Horner et al.
patent: 4533015 (1985-08-01), Kojima
patent: 4605092 (1986-08-01), Harris et al.
patent: 4729722 (1988-03-01), Toth
patent: 4790864 (1988-12-01), Kostun
patent: 4791810 (1988-12-01), Old et al.
patent: 5495872 (1996-03-01), Gallagher et al.
patent: 5529093 (1996-06-01), Gallagher et al.
patent: 5606297 (1997-02-01), Phillips
patent: 5827430 (1998-10-01), Perry et al.
patent: 6089348 (2000-07-01), Bokor
patent: 6338277 (2002-01-01), Diston et al.
patent: 6382033 (2002-05-01), van Bckkum et al.
patent: 6494105 (2002-12-01), Gallagher
patent: 6533065 (2003-03-01), Zanker
patent: 6851322 (2005-02-01), Gallagher
patent: 59046817 (1984-03-01), None
patent: 03114099 (1991-05-01), None
patent: WO 9420821 (1994-09-01), None
patent: WO 9922207 (1999-05-01), None
John W. Stuart, Pacific Gas and Electric Company, San Francisco, CA;Attenuation of Ultrasonic Noise in 2″ ABS Pipe Fittings;Presentation @ American Gas Association Conference, Dallas, TX, Apr. 2001.
Marcel J.M. Vermeulen, Instromet Ultrasonics BV, Dordrecht, The Netherlands, Geeuwke De Boer, Instromet Ultrasonics BV, Dordrecht, The Netherlands, Jim Bowen, Instromet Inc., Hosuton;A model for estimation of the ultrasonic acoustic noise level emitted by pressure regulating valves and its influence on ultrasonic flowmeters;Presentation @ American Gas Association Conference, Dallas, TX, Apr. 2001.
Gallagher James E.
Saunders Michael P.
Fulbright & Jaworski LLP
Martin Edgardo San
Savant Measurement Corporation
LandOfFree
System for filtering ultrasonic noise within a fluid flow... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for filtering ultrasonic noise within a fluid flow..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for filtering ultrasonic noise within a fluid flow... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3589934