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:
Apr. 17, 2001
Filed:
Jan. 11, 1999
Peter Alexander Fryer, W. Sussex, GB;
Stuart Michael Nevill, Kent, GB;
Stephen Philip Barnham Roe, Sussex, GB;
B&W Loudspeakers Limited, Worthing, GB;
Abstract
A loudspeaker drive unit (,) comprises a diaphragm (,), a chassis member (,) and a surround (,) connecting the outer portion of the diaphragm to the chassis member in which (i) substantially all parts of the surround (,) located between the diaphragm (,) and the chassis member (,) and capable of radiating sound are arranged parallel or at an acute angle with respect to the longitudinal axis of the loudspeaker drive unit (,), or (ii) the surround is made of a body of foam material (,) arranged to be compressed against the chassis member (,) when the diaphragm (,) moves towards the chassis member, or (iii) the bending wave impedance of the surround (,) is matched to the bending wave impedance of the diaphragm (,).