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:
May. 16, 2000
Filed:
Sep. 06, 1997
Michael A Thompson, Auburn, WA (US);
Other;
Abstract
A speaker enclosure for controlling an air pressure differential across a front and rear portion of a speaker cone comprising an enclosed rear chamber in communication with a primary channel having a constant cross-section, the primary channel in open communication with a convergence channel having a cross-section smaller than that of the primary channel, terminating in an orifice. In an alternate embodiment, a pair of speakers are utilized in a pair of enclosed rear chambers, each rear chamber in open communication with a primary channel of constant cross-section, each primary channel converging and joining in open communication with the convergence channel and terminating in an orifice. Additional embodiments include speaker enclosures with a front chamber adjacent a front side of the speaker to produce a pressure differential between the front chamber and the ambient air. The front chamber may have a sized opening to produce a regulated pressure flow.