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. 26, 2023
Filed:
Dec. 03, 2019
Devialet, Paris, FR;
Eduardo Mendes, Chabeuil, FR;
Bérenger Roig, Paris, FR;
DEVIALET, Paris, FR;
Abstract
Infinite acoustic baffle () comprising a box () and a loudspeaker () comprising a membrane () that is movable relative to the box (), the box () and the membrane () defining a substantially closed baffle chamber (); the loudspeaker () comprising an electrically controlled motor () for actuating the membrane () that is able to move relative to the box (), the baffle also comprising a mechanism () for axially urging the membrane () away from its median rest position counter to the pressure force exerted on the membrane () by the gas contained in the box () characterized in that the mechanism () comprises a cam () that is movable relative to the box () along an axis (X-X) for displacing of the cam under the displacement action of the membrane () and at least one cam follower (A,B) that is biased transversely to the cam () by at least one spring (A,B) and bears on the cam (), the cam () having at least one cam surface (A,B) capable of converting the transverse force of the or each spring (A,B) into an axial force on the cam (), the intensity of which varies depending on the position of the cam () relative to the box ().