Double-wall hollow body with interlayer and method for manufactu

Acoustics – Sound-modifying means – Mechanical vibration attenuator

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181208, 181256, F16F 1500

Patent

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052605221

ABSTRACT:
A double-wall hollow body comprises an inner hollow body and a cooperating outer hollow body. The outer hollow body is frictionally attached to the inner hollow body, and is radially spaced from the inner body so that an annular space is formed between the two bodies. Acoustic-damping insulating material is contained within the annular space, and forms an interlayer between the inner and outer bodies. An end of the double-wall hollow body is formed by respective ends of the inner and outer hollow bodies that rest directly against each other without insulating material. The inner hollow body is separated over an entire circumference from the outer hollow body by the insulating interlayer. Various methods of manufacturing the foregoing double-wall hollow body are also described. For instance, to apply the insulating material to the inner hollow body, such body may be heated and then rolled into the insulating material.

REFERENCES:
patent: 3415336 (1968-12-01), Arthur et al.
patent: 3765506 (1973-10-01), Strunk
patent: 4239091 (1980-12-01), Negrao
patent: 4272971 (1981-06-01), Loyd et al.
patent: 4860851 (1989-08-01), Krevor et al.

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