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Machine translation
1. (WO1980001933) FLUIDBORNE NOISE ATTENUATOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001933    International Application No.:    PCT/US1979/000140
Publication Date: 18.09.1980 International Filing Date: 07.03.1979
IPC:
F01N 1/22 (2006.01), F16L 55/033 (2006.01)
Applicants:
Inventors:
Priority Data:
US79/00140 07.03.1979 WO
Title (EN) FLUIDBORNE NOISE ATTENUATOR
(FR) DISPOSITIF D"ATTENUATION DU BRUIT TRANSMIS PAR UN FLUIDE
Abstract: front page image
(EN)A fluidborne noise attenuator (14) comprises a dampening medium (27) which exhibits a bulk modulus (e.g., 50,000 psi to 180,000 psi) substantially greater than that of an inert gas, such as nitrogen and substantially less than that of a hydraulic working fluid (e.g., 225,000 psi). The attenuator (14) is capable of attenuating noise levels of hydraulic fluid over wide frequency and mean system pressure ranges in contrast to conventional attenuators which are "tuned" for the attenuation of noise levels at a specific frequency and mean system pressure.
(FR)Un dispositif d"attenuation du bruit transmis par un fluide (14) comprend un milieu d"amortissement (27) qui possede un module d"elasticite (par exemple 50.000 psi a 180.000 psi) sensiblement superieur a celui d"un gaz inerte, tel que l"azote et sensiblement inferieur a celui d"un fluide de travail hydraulique (par exemple 225.000 psi). Le dispositif d"attenuation (14) est capable d"attenuer des niveaux de bruit d"un fluide hydraulique sur de grandes plages de frequence et de pression moyenne en comparaison aux dispositifs d"attenuation conventionnels qui sont "accordes" pour attenuer des niveaux de bruit a une frequence et une pression moyenne specifique.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)