Patent · US Expired

Sound insulation part for surfaces

US4705139A · kind A · utility

28Cited by

5References

11Claims

0Family size

Assignee

Dr. Alois Stankiewicz GmbH · DE

Inventors

Heinemann Gahlau · Celle, DE
Manfred Hoffmann · Würzburg, DE
Norbert Seemann · Bad Doberan, DE

Key dates

Filing date	Sep 8, 1986
Grant date	Nov 10, 1987
Priority date	—
Expiry date	Sep 8, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG10K11/172
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A sound insulation part for surfaces with known source-sink distribution, in particular in passenger spaces of motor vehicles, is provided, which is designed as a mass-spring system with discontinuities incorporated therein for the purpose of converting sources into sinks. In order to achieve a particularly effective sound insulation with low mass or light weight, the sound insulation part contains, over limited parts of its surface, closed cells (1) embedded in the spring (foam 3) and encased in coils (2). These cells (1) can be directed towards the heavy layer (4) or the panel (8) which the part adjoins, or can be wholly or partly in the intermediate region. The cells (1) can be gas- or air-filled. The foils (2) advantageously have masses of about 25 to 150 g/m.sup.2 of surface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.