Firma Carl Freudenberg

Klaus-Dieter Schmitt

Reinhard Stief

Gerhard Muller-Broll

Manfred Mattutat

Thomas Jost

Roger Schork

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 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.

Growing community of inventors

Gorxheimertal, Germany

Klaus-Dieter Schmitt