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. 22, 2017
Filed:
Feb. 19, 2014
Applicant:
Gp Acoustics (Uk) Limited, Maidstone, GB;
Inventors:
Jack Anthony Oclee-Brown, Tonbridge, GB;
Mark Alexander Dodd, Woodbridge, GB;
Assignee:
GP ACOUSTICS (UK) LIMITED, Maidstone, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 1/02 (2006.01); H04R 1/20 (2006.01); H04R 1/30 (2006.01); H04R 1/22 (2006.01);
U.S. Cl.
CPC ...
H04R 1/30 (2013.01); H04R 1/22 (2013.01); H04R 2201/34 (2013.01); H04R 2400/13 (2013.01);
Abstract
A phase plug for a loudspeaker having a driven diaphragm, wherein at least a portion of the surface of the phase plug disposed in use adjacent the diaphragm is generally annular in two orthogonal directions and has an axis in a third orthogonal direction, and wherein at least a portion of the said annular surface is shaped such that as successive radial cross-sections through the annular surface are generated by rotating a plane about the axis, the cross-sectional shape of the surface of the phase plug varies periodically as the angle of rotation increases.