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:
Jun. 04, 1996
Filed:
Dec. 12, 1994
Jorg Prokisch, Schwarzach, DE;
Markus Woldrich, Prien, DE;
Nokia Technology GmbH, Pforzheim, DE;
Abstract
According to the state of the art, double chamber bass reflex boxes are constructed so that the housing is separated by a partition wall into two spaces (13, 14). A loudspeaker (19) is inserted into the partition wall. One of the two spaces (13, 14) is equipped with an outlet opening, into which a so-called bass reflex tube is inserted for tuning the box. If complicated housing shapes are to be manufactured, it is not possible to build the bass reflex tube and the wall to which it is connected, in one piece. In such instances it is rather necessary to insert the so-called bass reflex tube into an opening in the wall, and to attach it by means of suitable sealing and connecting means. For that reason the invention has the task of presenting a housing for double chamber bass reflex boxes (10) which is especially easy to produce. This task is fulfilled in that the closed volume (13) of the box (10) is formed by a blow-molded hollow body (11), that the tuning space (14) of box (10) is also formed by a blow-molded hollow body (12), that a wall of each of the two hollow bodies (11, 12) contains a cavity (16) which extends to the inside of the hollow body (11, 12), and that the open volume (26) of box (10) is created by connecting the two hollow bodies (11, 12), when the walls (15) equipped with the cavities (16) are joined together. A particularly good space utilization is provided when the openings (22) and the outlet opening (24) are arranged symmetrical to each other.