Firma Carl Freudenberg

Thomas Jost

Reinhard Stief

Gerhard Muller-Broll

Manfred Mattutat

Klaus-Dieter Schmitt

Roger Schork

Klaus Bickel

Christoph Muller

Jurgen Carocci

A housing lining for a piston engine, drive motor, or machine composed of a sound-absorbent layer of fibers. The fibers are compressed and glued to form an essentially pore-free supporting frame at least in the vicinity of the edge of the layer.

Method of making a housing liner

Housing Lining

A panel element for insulating acoustically undesirable vibrations is disclosed. The panel element comprises a closed-cell foam element for closing off a hollow body provided with an opening on at least one side. The foam element possesses a mounting structure by which it can be fastened to the hollow body. The foam element is configured to the shape of the opening, and has on its perimeter a mounting structure. The mounting structure consists of a self-contained peripheral groove open in the direction of the boundary. The groove and the boundary can be brought into engagement with one another in a sealing and positive manner.

Vibration-insulating panel element

A wheel lining with a structure made of a polymer, mounted at a distance from wheel, self-supporting, and impermeable to air. The lining is double-walled and incorporates at least two chambers. The walls of the chambers the facing the wheel are provided with at least one opening each to form Helmholtz resonators.

Wheel lining

A housing lining is disclosed with a self-supporting and airborne sound-absorbing layer of fibers. The fibers are compressed and glued together at least in the region of the edge surrounding the layer on the outside, to form an essentially pore-free supporting frame. The supporting frame may be provided with a cup-shaped bulge which comprises sound absorption surfaces which have a sound impedance of 20 to 200 Rayl.

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Weinheim, Germany

Thomas Jost