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:
Aug. 23, 2005
Filed:
Jan. 03, 2001
Norbert Sann, Riegelsberg, DE;
Martin Reik, Saarbrücken, DE;
Stefan Hennes, Neunkirchen, DE;
Karl-heinz Leichner, Friedrichsthal, DE;
Norbert Sann, Riegelsberg, DE;
Martin Reik, Saarbrücken, DE;
Stefan Hennes, Neunkirchen, DE;
Karl-Heinz Leichner, Friedrichsthal, DE;
Hydac Filtertechnik GmbH, Sulzbach/Saar, DE;
Abstract
A filter device includes a filter housing () in which at least two filter elements () with differing filter grades of filter material () are arranged. The filter elements are partially separated from each other by a separating device (), with a through channel () of predetermined cross-section for a hydraulic connection between neighboring filter chambers (),. The filter chambers arranged prior to the filter materials () in the flow direction of the fluids for filtering. The filter device permits a combination of main- and side-stream filters in the smallest possible space, whereby very good purity levels for the filtered fluid are nevertheless achieved.