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US 5,589,242 AGranted
Housing Lining
AssigneeFirma Carl Freudenberg
InventorsReinhard Stief, Roger Schork, Gerhard Muller-Broll, Thomas Jost, Manfred Mattutat, Klaus-Dieter Schmitt
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Abstract
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.
Claims8
A housing lining comprising a sound-absorbent layer of fibers;
- wherein the housing lining includes a supporting structure comprising at least a supporting frame located at a peripheral edge of said layer of fibers;
- wherein said supporting structure is formed of a first portion of fibers, wherein said first portion of fibers comprises compressed and glued fibers;
- wherein said supporting structure substantially bounds at least one intermediate area formed of a second portion of fibers;
- wherein the fibers in said supporting structure are more compressed than the fibers in said intermediate area;
- and
- wherein said supporting structure comprises at least one cup-shaped convexity forming a Helmholtz resonator with an opening for air to pass through.
3 more elements
A housing lining comprising a sound-absorbent layer of fibers;
- wherein the housing lining includes a supporting structure comprising at least a supporting frame located at a peripheral edge of said layer of fibers;
- wherein said supporting structure is formed of a first portion of fibers, wherein said first portion of fibers comprises compressed and glued fibers;
- wherein said supporting structure substantially bounds at least one intermediate area formed of a second portion of fibers;
- wherein the fibers in said supporting structure are more compressed than the fibers in said intermediate area;
- wherein said supporting structure further comprises a supporting element located inside of said supporting frame;
- and
- wherein said supporting structure comprises at least one cup-shaped convexity forming a Helmholtz resonator with an opening for air to pass through.
4 more elements
Dependencies are inferred from the claim text.