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:
Sep. 01, 2026
Filed:
Nov. 20, 2024
Gp Acoustics (Uk) Limited, Maidstone, GB;
Mark Alexander Dodd, Budleigh Salterton, GB;
GP ACOUSTICS (UK) LIMITED, Maidstone, GB;
Abstract
A compression driver comprising a diaphragm having a concave sound-radiating surface, a phase plug having a convex surface shaped to match the concave surface of the diaphragm, and a magnet, the diaphragm being connected to a voice coil former along a line forming a closed loop, the diaphragm and former being adapted to reciprocate along an axis, the diaphragm, phase plug, voice coil former together being configured to form: a compression cavity; a surround cavity; and a magnet cavity, in which an abstract surface can be generated by rotating about the axis an abstract line extending from the diaphragm on the line of the closed loop to the convex surface of the phase plug perpendicularly thereto, and in which a plurality of holes are formed in the voice coil former around at least a part of its circumference and pass through the voice coil former to connect the compression cavity with the surround cavity, the holes having a total area substantially the same as the area of the abstract surface.