Acoustics – Sound-modifying means – Muffler – fluid conducting type
Patent
1989-08-25
1990-09-04
Fuller, Benjamin R.
Acoustics
Sound-modifying means
Muffler, fluid conducting type
181238, 181258, 181268, 181272, 181296, F01N 110
Patent
active
049536591
ABSTRACT:
This invention provides an improved method and apparatus for attenuating the sound of flowing fluid. The apparatus of this invention includes at least two attenuating areas, preferably particle-filled containers arranged serially within a housing. One of the attenuating areas has a central void into which a portion of the fluid may flow on its way through the muffler. The muffler may also include a mechanism for permitting one of the attenuating devices to move in order to accommodate changes in fluid pressure. The method includes the steps of introducing a pressurized fluid into first flow resisting means disposed within a housing; passing all of the fluid from the first speed dissipating means into a first void disposed within the housing; splitting the flow in the first void into first and second subflows; passing the first subflow from the first void into a second flow resisting means disposed within the housing; passing the first subflow out of the housing; and passing the second subflow from the first void out of the housing without passing into the second speed dissipating means.
REFERENCES:
patent: 226905 (1980-04-01), Curie
patent: 1519527 (1924-12-01), Bumbaugh et al.
patent: 2625234 (1953-01-01), Fina
patent: 4353434 (1982-10-01), Norris
patent: 4682470 (1987-07-01), Shaff
Dresser Industries-Product Information Consolidated Silencers, p. SV/PI-33A, Date: Jan. 10, 1980.
Fluid Kinetics-Blow-Off Silencers.
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