Noise attenuation assembly
First Claim
Patent Images
1. A noise attenuation assembly comprising:
- a shell defining an interior chamber;
a passage tube having an inlet end coupled to a first end of said shell and an outlet end coupled to a second end of said shell;
an overlap tube concentric to and surrounding an overlap portion of said passage tube, said overlap tube forming an annular gap with said overlap portion of said passage tube, said overlap portion of said passage tube defining at least one opening in communication with said annular gap, said annular gap having a closed end and on open end in communication with said interior chamber; and
at least one noise prevention pad disposed within said annular gap, said at least one noise prevention pad having a first surface in contact with said overlap portion of said passage tube, and a second surface in contact with said overlap tube wherein said passage tube has an inner wall defining a gas passage and an outer wall having said at least one noise prevention pad attached thereon, said at least one noise prevention pad being spot welded to said outer wall of said passage tube.
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Abstract
The present invention provides a noise attenuation assembly having at least one noise prevention pad disposed within an annular gap formed between a gas passage tube and an overlap tube. The noise prevention pad prevents the two tubes from coming in contact during thermal expansion of the tubes, and allows the tubes to contract without causing “tick and ping” noise, during a cool down.
23 Citations
16 Claims
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1. A noise attenuation assembly comprising:
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a shell defining an interior chamber;
a passage tube having an inlet end coupled to a first end of said shell and an outlet end coupled to a second end of said shell;
an overlap tube concentric to and surrounding an overlap portion of said passage tube, said overlap tube forming an annular gap with said overlap portion of said passage tube, said overlap portion of said passage tube defining at least one opening in communication with said annular gap, said annular gap having a closed end and on open end in communication with said interior chamber; and
at least one noise prevention pad disposed within said annular gap, said at least one noise prevention pad having a first surface in contact with said overlap portion of said passage tube, and a second surface in contact with said overlap tube wherein said passage tube has an inner wall defining a gas passage and an outer wall having said at least one noise prevention pad attached thereon, said at least one noise prevention pad being spot welded to said outer wall of said passage tube. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pipe assembly comprising:
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an inner pipe defining a first gas passage;
an outer pipe defining a second gas passage, said outer pipe having an overlap portion surrounding an overlap portion of said inner pipe, said second gas passage in communication with said first gas passage of said inner pipe, said overlap portion of said inner and said outer pipes forming an annular gap open at an overlap end of said outer pipe; and
at least one noise prevention pad disposed within said annular gap keeping said overlap portions of said inner and said outer pipes from coming in contact wherein said inner pipe has an outer wall and said at least one noise prevention pad is attached thereon. - View Dependent Claims (9, 10)
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11. A noise attenuation assembly comprising:
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a first rigid tube defining a first gas passage;
a second rigid tube defining a second gas passage in fluid communication with said first gas passage, said second rigid tube surrounding at least a portion of said first rigid tube to define an overlap portion;
wherein said second rigid tube is spaced apart from said first rigid tube at said overlap portion to form an annular gap; and
at least one noise prevention pad disposed within said annular gap wherein said at least one noise prevention pad is mounted to an external surface of said first rigid tube. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification