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:
Apr. 24, 2018
Filed:
Apr. 17, 2014
Dräger Safety Ag & Co. Kgaa, Lübeck, DE;
Dräger Safety AG & Co. KGaA, Lübeck, DE;
Abstract
A blower filter device () for a respirator system () has a filter unit () receiving an air filter () and a blower unit () drawing in the filtered air and generating discharged air. The blower unit has a blower () and a driving motor (). An improved respirator system is provided with the blower filter device having a pressure sensor () arranged in the discharged air measuring the pressure of the discharged air, a mass flow sensor () arranged in the discharged air measuring the mass flow of the discharged air, or a parameter-determining unit () determining an operating parameter of the motor. A control unit () determines the volume flow of the discharged air via the measured pressure, the measured mass flow or based on the operating parameter determined and sets the motor as a function of the volume flow determined.