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:
May. 17, 2005
Filed:
Aug. 09, 2002
Applicants:
Heinz Reinhardt, Edingen, DE;
Richard Borris, Heppenheim, DE;
Christoph Malig, Weinheim, DE;
Inventors:
Assignee:
Carl Freudenberg KG, Weinheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B021/00 ;
U.S. Cl.
CPC ...
Abstract
A method of monitoring the service life of a filter () in a filter system equipped with a fan, in particular a filter () in an air conditioning system of a motor vehicle, the instantaneous air speed () preferably being measured on each startup of the system using a sensor () downstream from the filter (), compared to the reference air speed (R) from the unloaded filter (), and transmitted to a service computer and/or indicated on a display, and the need to replace the filter being signaled when this value falls below a predetermined threshold or threshold range of the instantaneous air flow rate ().