Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Raymond Lathrop0
Leslie Hoffman0
Date of Patent
September 7, 2010
0Patent Application Number
117886240
Date Filed
April 20, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A silencer for a CPAP device comprises a housing assembly defining a flow path passing therethrough and including at least one of an inlet chamber, an acoustic chamber and a blower chamber. Each of the chambers has an inlet and an outlet for fluid communication therebetween. The silencer includes a combination of reactive components, resonators and dissipative elements disposed within the inlet, acoustic and blower chambers. The reactive component may be configured as a compliant-walled reactive tube. The resonator may be configured as a perforated plate defining a cavity volume. The dissipative element may comprise porous material substantially occupying the cavity volume bounded by the perforated plate in the chamber walls.
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