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:
Jan. 21, 2020
Filed:
Oct. 26, 2015
Dräger Safety Ag & Co. Kgaa, Lübeck, DE;
Mathias Dehmke, Lübeck, DE;
Björn Ehler, Lübeck, DE;
Thomas Pernot, Lübeck, DE;
Achim Volmer, Lübeck, DE;
Dräger Safety AG & Co. KGaA, Lübeck, DE;
Abstract
A blower filter system () has a blower filter device () with a housing (), an air inlet (), an air outlet () and an air duct () extending between the air inlet () and the air outlet () in the housing (). A blower (), associated with the air duct (), delivers air from the air inlet () to the air outlet (). An air filter () and a carrying system () can be connected to the blower filter device (). A tube () extends from the air outlet () to a breathing mask (). A sound emission unit () is associated with the blower filter device (). A wall section () of the air duct () is formed by an acoustic membrane () for coupling sound into the air duct (). The sound emission unit () is arranged in the housing () of the blower filter device ().