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:
Oct. 23, 2001
Filed:
Oct. 04, 1999
Michael Rosert, Lübeck, DE;
Manfred Gdulla, Lübeck, DE;
Other;
Abstract
The invention is directed to a voice transmitter for a breathing protective mask. The voice transmitter includes a membrane housing (,) and a clamping ring (,) which can be connected to the membrane housing (,). The voice transmitter also includes a voice membrane (,) between the membrane housing (,) and the clamping ring (,). The voice membrane (,) has an outer membrane portion (,) which is accommodated at a connecting location between the clamping ring (,) and the membrane housing (,). An inner portion (,) of the membrane (,) is tensioned over an annularly-shaped projection (,) located on the membrane housing (,). The pretensioning of the voice membrane is adjusted in a simple manner in that the clamping ring (,) has an annularly-shaped support surface,for the inner membrane portion (,) and that the connecting location is configured as a threaded connection (,).