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. 18, 2009
Filed:
Aug. 02, 2005
Rüdiger Weich, Rivnitz-Damgarten, DE;
Thomas Grassl, Lübeck, DE;
Rüdiger Müller, Stockelsdorf, DE;
Manfred Gdulla, Lübeck, DE;
Siegbert Tolk, Lübeck, DE;
Olaf Balke, Reinfeld, DE;
Rüdiger Weich, Rivnitz-Damgarten, DE;
Thomas Grassl, Lübeck, DE;
Rüdiger Müller, Stockelsdorf, DE;
Manfred Gdulla, Lübeck, DE;
Siegbert Tolk, Lübeck, DE;
Olaf Balke, Reinfeld, DE;
Dräger Safety AG & Co. KGaA, Lübeck, DE;
Abstract
A gas mask for normal pressure operation and overpressure operation allows changeover of the expiration valve () from normal pressure operation to overpressure operation is made possible in a simple manner. The pretension of the valve spring () of the expiration valve () is adjusted by an angle lever () pivotable about an axis of rotation ().