Noise attenuating drying apparatus for motor vehicles
OwnerDarryl D Dobie, Cheryl A Dobieinventors
Life of this patent
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Abstract
An air duct for a motor vehicle air dryer has an outer shell defining an inner surface. A porous, fluid permeable lining for attenuating noise caused by turbulent air flow through the air duct is positioned on the shell inner surface, and defines an inner surface. The lining is retained in place by a relatively rigid expanded mesh adjacent the inner surface of the lining. The interior lining and mesh is preferably removable from the outer shell, but may be permanently mounted therein.
Claims13
An air intake duct for a motor vehicle air drying apparatus comprising:
- an outer cylindrical duct defining an inner surface;
- and
- a removable cylindrical sleeve including:
- a porous layer adjacent said duct inner surface and defining an inner surface;
- an outer rigid expanded mesh lining said inner surface of said porous layer and retaining said porous layer;
- and
- an inner cylinder mounted within said sleeve and extending coaxially therein and having an outer surface spaced radially inwardly from said outer expanded metal mesh;
- said cylinder comprising a porous layer defining an outer surface and an outer expanded metal mesh surrounding and supporting said cylinder porous layer and defining said outer surface of said inner cylinder.
An air intake duct for a motor vehicle air dryer, comprising:
- an outer cylindrical duct having an air inlet end and an air outlet end and defining an inner surface and a cylindrical longitudinally extending air passage having a center axis;
- an intermediate sleeve removably positioned within said outer duct adjacent the inner surface thereof and comprising an inner rigid, expanded mesh cylindrical sleeve and an outer porous sleeve contained and supported on its inner surface by said mesh sleeve and having its outer surface engaging the inner surface of said outer cylindrical duct, said inner mesh sleeve having an inlet end and an outlet end corresponding to the inlet and outlet ends respectively of said outer duct;
- annular end channels mounted at the inlet and outlet ends of said mesh sleeve for supporting said porous sleeve and having an outer radial dimension corresponding to the internal diameter of said outer duct for supporting said intermediate sleeve therein;
- an inner longitudinally extending sleeve positioned coaxially in said intermediate sleeve, said inner sleeve having inner and outer spaced apart wire mesh sleeves defining an annular chamber;
- an annular porous sleeve retained in said annular chamber;
- end caps covering the ends of said inner sleeve;
- and
- brackets extending between said end caps and said annular end channels supporting said inner sleeve on said intermediate sleeve;
- said outer duct defining a plurality of perforations adjacent the inner end thereof forming intake air passages.
A method of attenuating the noise of air flow in the intake section of an air dryer for motor vehicles, comprising:
- inserting into said intake section a removable cylindrical sleeve including an outer-layer of porous material and an inner layer of porous material spaced radially inwardly of said outer layer supporting said layers of porous material with rigid, stiffly flexible, expanded mesh layers;
- and supporting said layers of porous material and rigid expanded mesh layers wit radial panels of porous material extending therebetween.
A method of attenuating the noise of air flow in the intake section of an air dryer for motor vehicles, comprising:
- inserting into said intake section of an air dryer for motor vehicles a removable cylindrical sleeve including an outer layer of porous material and an inner layer of porous material spaced radially inwardly of said outer layer;
- supporting said layers of porous material with rigid, stiffly flexible, expanded mesh layers;
- removing the removable cylindrical sleeve from the intake section, and
- inserting another removable cylindrical sleeve into said intake section.
Dependencies are inferred from the claim text.