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:
Feb. 01, 2000
Filed:
Oct. 16, 1997
Applicant:
Inventor:
Stuart Michael Nevill, Kent, GB;
Assignee:
B & W Loudspeakers Limited, Worthing, GB;
Primary Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
181156 ; 181199 ;
Abstract
An enclosure (1) for a loudspeaker drive unit (5) comprises a chamber (2) defined by one or more walls (3), in which a loudspeaker drive unit (5) is to be mounted. A port member (4) defines a passageway providing fluid communication between the interior and the exterior of the chamber (2). The internal surface (9) of the port member (4) is, at least in part, of a coarse texture. A multiplicity of indentations (11) and/or peaks may provide the coarse texture. This reduces so-called 'chuffing' noises caused by air movement through the port member.