Sound absorber

• US 20050067220A1
• Filed: 08/30/2004
• Published: 03/31/2005
• Est. Priority Date: 09/08/2003
• Status: Active Grant

• Current Assignee: BorgWarner Incorporated, Veritas AG (Poppe-Veritas Holding GmbH & Company KG)
• Original Assignee: BorgWarner Incorporated, Veritas AG (Poppe-Veritas Holding GmbH & Company KG)
• Inventors: Keller, Uwe, Stonner, Helmut, Von Der Hagen, Joachim, Lowe, Hans-Joachim, Metz, Dietmar
• Granted Patent: US 7,387,188 B2
• Time in Patent Office: Days
• US Class Current: 181/250
• CPC Class Codes: F02M 35/10137 Flexible ducts, e.g. bellows or hoses
• CPC Class Codes: F02M 35/1216 by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
• CPC Class Codes: F02M 35/1266 comprising multiple chambers or compartments
• CPC Class Codes: F02M 35/1283 Manufacturing or assembly; Connectors; Fixations

Abstract

The present invention relates to a sound absorber comprising an inner component and an outer component surrounding said inner component, said inner component defining an inner wall provided with apertures, and said outer component defining an outer wall extending along said inner wall. For improving the sound-absorbing properties as well as the flexibility of the sound absorber, the outer wall is implemented as a bellows which, together with the inner wall, defines individual cavities, the apertures of the inner wall opening into said cavities.

Claims

1. A sound absorber comprising an inner component, said inner component defining an inner wall provided with apertures, and said outer component defining an outer wall extending along said inner wall,

wherein

the outer wall is implemented as a bellows which, together with the inner wall, defines individual cavities, the apertures of the inner wall opening into said cavities.

2. A sound absorber according to claim 1, wherein the bellows extends over the whole area of the inner wall provided with said apertures.

3. A sound absorber according to claim 1, wherein the inner component comprises a hose or a tube, which are each provided with radial apertures.

4. A sound absorber according to claim 1, wherein the inner component comprises hose segments or tubular segments, which are each provided with radial apertures.

5. A sound absorber according to claim 1, wherein the inner component is connected to the outer component in that it is thermally formed thereon.

6. A sound absorber according to claim 1, wherein the inner component is mechanically connected to the outer component.

7. A sound absorber according to claim 1, wherein the inner component is integrated in a quick coupling.

8. A sound absorber according to claim 1, wherein the outer component is flexible along the whole length of the inner component.

9. A sound absorber according to claim 1, wherein the outer wall is arranged concentrically with the inner wall.

10. A sound absorber according to claim 1, wherein the outer wall has a conical shape.

11. A sound absorber according to claim 1, wherein the materials of the inner and outer components comprise NBR, CR, ECO, AEM, ACM, silicone, and FPM.

12. A sound absorber according to claim 1, wherein the inner component is made of plastic material.

13. A sound absorber according to claim 1, wherein the outer component and/or the inner component comprise(s) a pressure carrier.

14. A sound absorber according to claim 1, wherein the bellows extends beyond the inner component in the longitudinal direction of the sound absorber.