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. 10, 2005
Filed:
Dec. 09, 1999
Applicants:
Jan Loncke, Zwevegem, BE;
Johan Vandamme, Deinze, BE;
Inventors:
Jan Loncke, Zwevegem, BE;
Johan Vandamme, Deinze, BE;
Assignee:
N.V. Bekaert S.A., Zwevegem, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D039/20 ;
U.S. Cl.
CPC ...
Abstract
A layered filtering structure () comprises at least a first layer () and a second layer (). Each layer comprises a web of metal fibers which has been sintered. The two layers () are in contact with each other. The first layer, most close to the filter inlet side has a porosity below 55%, and the second layer, closer to the filter outlet side has a porosity which is at least 20% greater than the porosity of the first layer. The first layer is compacted in a separate manufacturing step. The layered filtering structure combines the advantage of a small filter rating with a low pressure drop.