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:
Feb. 02, 2021
Filed:
Oct. 06, 2014
Dräger Safety Ag & Co. Kgaa, Lübeck, DE;
Dräger Safety AG & Co. KGaA, Lübeck, DE;
Abstract
A fan filter device () for a respirator () includes an air inlet () for unfiltered air and an air outlet () for the discharge of filtered air. A fan unit (), for aspirating air through the air inlet, includes a fan motor () and a fan sensor (). The fan sensor is designed for detecting at least one operating parameter of the fan motor. The fan filter device further includes a filter unit () for receiving a filter () for filtering the aspirated air and an air flow sensor () for detecting at least one flow parameter of the filtered air flowing through the air outlet. A control unit () is configured to monitor the fan motor as a function of the at least one flow parameter and the at least one operating parameter. A respirator and method for operating such a fan filter device are also provided.