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US 2004/0069561 A1Published application
Polyurethane foam cabinets
AssigneeHarman International Industries, Incorporated
InventorsDavid H. Cox, Chen-Hui Huang
Life of this patent
Estimating the term…
Abstract
The invention provides a loudspeaker system having a housing made of a plastic casing and a foam positioned against the interior walls of the casing through a reaction between the foam and the interior wall. The foam increases the stiffness of the walls as well as provides sound damping. Additionally, the foam may create a foam rib between a stud and the casing to support the stud and transfer the stiffness of the stud to a wall of the casing.
Claims25
A housing for a loudspeaker system, comprising:
- a casing that forms an interior;
- and
- a foam adhered to the interior of the casing that increases the stiffness of the casing and dampens sounds within the casing, where the foam includes at least one ingredient that reacts to the casing to adhere the foam to the interior of the casing.
A loudspeaker system, comprising:
- a baffle board;
- at least one driver positioned in the baffle board;
- and
- a housing including a foam adhered to an interior of a casing that increases the stiffness of the housing and dampens sounds within the casing, where the foam includes means for adhering the foam to the interior of the casing.
1 more element
A method to form a housing of a loudspeaker system, comprising:
- positioning a tooling core within an interior of a casing to define a chamber;
- placing an expandable foam in the chamber;
- expanding the foam so that the foam fills the chamber and reacts with the casing to adhere to the casing;
- and
- removing the tooling core from the casing.
2 more elements
Dependencies are inferred from the claim text.