Noise insulation structure of synthetic resin made chamber
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorsHisako Nakano, Tatsuo Iino, Mamoru Fukushima
Life of this patent
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Abstract
A noise insulation structure of a synthetic resin made conduit includes a synthetic resin made chamber and a rubber made noise insulation member. Since the chamber is closely covered around with the noise insulation member through projections and grooves formed on the contact surface of the chamber with the noise insulation member. Further, cylindrical blind-end bores are provided on the inner surface of the noise insulation member so as to form air columns when the noise insulation member is installed on the chamber. The air columns serve as resonators to muffle noise.
Claims13
A noise insulation structure of a synthetic resin made air intake conduit of an internal combustion engine, comprising:
- a synthetic resin made chamber forming a part of said air intake conduit;
- and
- a noise insulation member mounted on said chamber in such a manner as covering said chamber.
A noise insulation structure of a synthetic resin made conduit, comprising:
- a synthetic resin made chamber;
- and
- a noise insulation member installed on said chamber in such a manner as covering said chamber, wherein
- said chamber has a plurality of ribs and a plurality of first grooves formed between said two adjacent ribs on the outer surface thereof, said noise insulation member has a plurality of projections extending along said ribs and a plurality of second grooves formed between said two adjacent projections, said ribs fit to said second grooves and said projections fit to said first grooves so that said chamber has a close contact with said noise insulation member.
A noise insulation structure of a synthetic resin made conduit, comprising:
- a synthetic resin made chamber;
- and
- a noise insulation member installed on said chamber in such a manner as covering said chamber, wherein
- said chamber has a plurality of protrusions integrally formed with said chamber, said noise insulation member has a plurality of through holes and said noise insulation member is secured to said chamber by deforming a top portion of said protrusion by heating said top portion after fitting said protrusion to said through hole.
Dependencies are inferred from the claim text.