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. 29, 2019
Filed:
Jul. 05, 2013
Dräger Safety Ag & Co. Kgaa, Lübeck, DE;
Achim Volmer, Lübeck, DE;
Björn Ehler, Lübeck, DE;
Mathias Dehmke, Lübeck, DE;
Andreas Sürig, Krummesse, DE;
Dräger Safety AG & Co, KGaA, Lübeck, DE;
Abstract
A blower filter system includes a blower unit (), an electric motor () for driving a blower impeller, a control unit () for controlling the electric motor, contacts () for connecting to a battery pack, and a battery pack () with secondary cells () with high energy density and contacts () for connecting to the blower unit. The blower unit () can be detachably coupled to the battery pack (). The battery pack is electrically connected to the blower unit via the contacts. The battery pack () has protective circuits including electronic components () to electrically switch off at least one of the plurality of secondary cells () of the battery pack if excessive currents and/or excessive temperatures occur. The battery pack () and the blower unit () are each at least partially cast in a casting compound.