The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1999
Filed:
May. 12, 1998
David Cahill, Merrimac, MA (US);
Aaron Linn, Portsmouth, NH (US);
Derek Hatchett, Brookline, MA (US);
Boston Acoustics, Inc., Peabody, MA (US);
Abstract
An audio speaker, the voice coil of which is passively cooled by using at least one of the speaker cone and spider as a bellows to draw air in and to push air out through a first vent passing through the voice coil and a second vent, connected to the first vent through an air flow path, which second vent is formed in a basket of the speaker which is formed of a material having good heat transfer properties. Air drawn into the speaker through the first vent removes heat from the voice coil and is heated thereby. This air is mixed with cooler air drawn in through the second vent which cooler air is expelled through both vents under appropriate action of the bellows. Partially cooled air expelled through the first vent further cools the voice coil and expelled through the second vent, which is also partially heated, has heat removed therefrom as it passes through the second vent formed in the basket, the relatively large area of the basket passed through by this air functioning as a heat sink. Turbulence in the vents assures air exchange at the entrances to the vents and the drawing of replacement air therein.